Genius Battery Chargers | Car, Boat, Motorcycle, Solar & On-Board

You can download a copy of your owner’s manual and user guide on our website. View the following link: http://www.geniuschargers.com/support/manuals

You can register your battery charger by filling out the registration card included with the user guide or you can register online. To register online, click here: http://www.geniuschargers.com/register

On most of our battery chargers you can find the serial number in multiple locations, including, on the battery charger, on the owner’s manual and user guide or on the packaging.

You can charge any type of lead-acid battery, including Wet, Gel, MF and AGM.

No. The battery chargers are designed for lead-acid batteries only.

These are abbreviations for battery chemistries: Wet (Flooded), Gel (Gel Cell), MF (Maintenance-Free) and AGM (Absorption Glass Mat).

If you don’t know the chemistry of your battery, you should contact the place of purchase or the battery manufacturer directly before using the battery charger.

The NORM charge mode is for Wet, Gel and MF batteries.

The COLD/AGM charge mode is for AGM (Absorption Glass Mat) batteries or batteries in cold weather below 32°F (0°C).

Because of the technology used in AGM batteries and the effects of temperature on the battery, the COLD/AGM charge mode uses a slightly higher charging voltage than the NORM charge mode.

No, unless the ambient temperature is below 32°F (0°C). The increased charging voltage used in the COLD/AGM charge mode can overcharge the battery and cause damage if not used properly.

The 13.6V SUPPLY mode is used for low voltage batteries, maintenance charging or as a power supply.

The 13.6V SUPPLY mode is extremely useful mode for recovering low voltage batteries as there is no voltage restriction when using this mode.

The 16V BOOST mode is used to recover battery capacity from a stratified (sulfated) battery by applying a specialized high 16.5V (17V Max) voltage to soften and melt down sulfate from the battery plates so that the material becomes usable again.

An ideal time is when you have deeply discharged a battery and left it in a discharged state for a period of time. In this situation, the battery can develop sulfation which will reduce battery life and capacity. Obviously, we recommend avoiding this situation. However, should this occur, you can use the 16V BOOST mode to recover the lost capacity. Be proactive. The longer the battery is left in a discharged state, the higher the probability for permanent capacity loss. For optimal results, we suggest you take a 12V battery through a full charge cycle (i.e. a fully charged battery) before using the 16V BOOST mode.

The 32V BOOST mode is used to recover battery capacity from a stratified (sulfated) battery by applying a specialized high 33V (34V Max) voltage to soften and melt down sulfate from the battery plates so that the material becomes usable again. The "32V BOOST" mode is for 24V batteries only.

An ideal time is when you have deeply discharged a battery and left it in a discharged state for a period of time. In this situation, the battery can develop sulfation which will reduce battery life and capacity. Obviously, we recommend avoiding this situation. However, should this occur, you can use the 32V BOOST mode to recover the lost capacity. Be proactive. The longer the battery is left in a discharged state, the higher the probability for permanent capacity loss. For optimal results, we suggest you take a 24V battery through a full charge cycle (i.e. a fully charged battery) before using the 32V BOOST mode.

The 13.6V EQUALIZATION mode is used to provide an equalization charge by delivering a constant voltage of 13.6V. This mode is especially useful in equalizing a bank of batteries, whether in series or parallel configuration. The effects of battery equalization become more pronounced as the battery bank grows in size.

The 12V CALCIUM mode is for charging calcium (also known as calcium-calcium) batteries. This is not to be confused with lead-calcium batteries. The 12V CALCIUM mode uses a high charging voltage that can overcharge or damage lead-calcium or other lead-acid batteries.

The SILENT NIGHT mode is only available on the G26000 which requires an internal cooling fan to regulate the heat generated by the battery charger. You would use this mode to disable the cooling fan for quiet, nighttime operation.

Ah stands for Amp-Hour. The Ah Rating measures a battery’s storage capacity. Generally speaking, the Ah Rating measures how much amperage is available over a 20 hour period until the battery voltage falls to 10.5V (12V). Not all battery manufacturers use Ah when rating their batteries. Some manufacturers may use Cold Cranking Amps (CCA), Cranking Amps (CA), Marine Cranking Amps (MCA) or Reserve Capacity (RC). We like the Ah Rating best. The Ah Rating is a simple and easy to understand.

Unfortunately, no. There is no direct correlation between the capacity ratings. If your battery is not labeled with an Ah Rating, we suggest you contact the place of purchase or the battery manufacturer directly to obtain this information.

The Ah Rating of a battery makes this decision process easy. Each of our battery chargers are rated for a range of batteries (based on Ah). For example, our model G1100 is rated for batteries between 2.2-40Ah. If the battery you are charging is within this range, you can rest assured you have selected the appropriate battery charger.

This is a decision based on price, charge time and features. As an example, let's say you have a 20Ah battery and you are deciding between a G1100 (2.2-40Ah) and a G3500 (14-120Ah). Both of these battery chargers are capable of charging your 20Ah battery, but the time to charge the battery will be different. Assuming an average Depth of Discharge (DOD) of 50% (or 10Ah), the G1100 can recharge the battery in approximately 9 hours (10 / 1.1A) versus the G3500 in approximately 2.9 hours (10 / 3.5A). As you can see, the G3500 can charge your battery faster because it can supply more current to the battery. However, there is a price difference between these two models, so you would have to decide which was more important to you.

Sort of. It is one of many factors you should consider when selecting a battery charger. However, selecting a battery charger solely based on Amperage is a common misconception. The quality and performance of a battery charger is directly related to how much capacity the battery charger returns. We call this Return of Capacity (ROC). How much capacity you return to the battery is far more important than how much Amperage the battery charger can output. These are two very different concepts.

It depends on which model you have and the Depth of Discharge (DOD) of the battery. You can find approximate charging time charts in the owner’s manual and user guide, as well as, on our website. Check the "Tech Specs" for any given model for this information on our website.

No. Charging a battery at an Amperage higher than recommended can cause severe damage to the battery.

No. Charging a battery at Amperage lower than recommended will significantly increase battery charge times. However, our battery chargers can maintain most battery sizes.

Indefinitely. However, you should always check on the battery periodically. If the battery ever feels unusually warm, remove the battery charger from the battery and have the battery evaluated by your local battery store.

No. You do not need to disconnect the battery before charging. In fact, you can even permanently install the eyelet terminal connectors to your battery for quick and easy battery charging. However, some of our battery chargers do come with charge modes that have high charging voltages, such as, 16V BOOST, 32V BOOST and 12V CALCIUM. These charge modes may damage sensitive electronics. When using these charge modes, consult the manufacture or remove the battery.

Nothing. Our battery chargers feature reverse polarity protection, so no damage will occur to the battery or battery charger. However, when using the 13.6V SUPPLY charge mode, this feature is disabled. Pay close attention to the polarity of the battery terminals when using this charge mode.

Before using 13.6V SUPPLY charge mode, you need to be sure of the polarity of the battery terminals. The safest way to do this is disconnect the battery charger from the AC electrical outlet and connect battery connectors to the battery. Our reverse polarity safety feature works even when the battery charger is not plugged into an electrical outlet. Once you have determined the polarity of the battery terminals, make a note of it.

It depends. Some of our battery chargers can charge multiple battery voltages, such as 6V &12V or 12V & 24V. Consult the owner’s manual and user guide.

If you accidentally choose the wrong battery voltage, the battery charger will blink an ERROR condition. An ERROR condition blinks the ERROR LED and CHARGE LED(S). If you get this type of ERROR, select the correct battery voltage to CLEAR the ERROR.

The battery charger cannot charge the battery. However, our battery chargers come with an Auto-Memory feature, so when the power is restored, the battery charger will return to the previously selected charge mode.

The VosFX Processor is a revolutionary smart processor utilizing sophisticated levels of intelligence to alter the charge process based on organic feedback from the battery to extend battery life. The VosFX Processor quickly and efficiently makes decisions on how to charge the battery without risking user safety or damage to the battery.

Rapid Charging Technology is a charge process used to increase the battery charge time versus traditional linear battery chargers.

Variable Input Compensation ensures that the rated amperage of the battery charger remain constant from 85-130VAC. Without Variable Input Compensation, the battery charger's rated amperage will be reduced or increased, which can lead to undercharging or overcharging the battery. In some instances, some battery chargers won’t even work as the AC line voltage is reduced.

Applying the proper charging voltage is critical for achieving optimum battery performance and longevity. The ideal charging voltage required by a battery changes with temperature. The temperature sensor allows the battery charger to adjust the charging voltage continuously based on actual ambient temperatures. Temperature compensation assures that the battery receives the proper charging voltage as the temperature changes during normal operation. Without temperature compensation, the charging voltage may be too low or too high depending on the temperature. At low temperatures, the charging voltage may lead to undercharging the battery. At high temperatures, the charging voltage may lead to overcharging the battery. Both of these conditions may reduce battery performance and battery life.

Ingress Protection (IP) Rating specifies the environmental protection the enclosure provides. The IP Rating is normally two numbers. The first number describes the protection from solid objects or materials and the second number describes its protection from liquids (water).

It depends on the IP Rating, your definition of waterproof, and the model number. For example, the GEN Series On-Board Battery Chargers are all rated at IP68. IP68 means the battery charger is completely protected from dust and long periods of immersion under water. We would consider an IP68 Rating as waterproof. The multi-purpose battery chargers have various IP ratings based on their features and are designed to be splash resistant, but not waterproof. For your safety, do not get them wet.

It depends. Yes, as long as the battery voltage of the batteries match the battery voltage on the battery charger. No, if the batteries connected together comprise of a battery voltage higher or lower than the battery voltage of the battery charger.

No. Do not charge a frozen battery. Allow the battery to thaw before attempting to charge the battery.

Yes. You can charge deeply discharged batteries down to 2V. If the battery is below 2V, you will need to have a battery charger with the 13.6V SUPPLY mode to increase the battery voltage for the battery charger to be able to perform a normal charge. It is important to note here that a deeply discharged battery is a warning sign of a bad battery. Additionally, continual deep discharged may shorten the life of the battery. As a standard matter of practice, you should avoid discharging your battery below 50% Depth of Discharge (DOD).

Positive Ground Systems are not very common nowadays. They are typically found on vintage cars (i.e. classic cars) and tractors manufactured before the early 1970’s. Most battery systems are Negative Ground Systems.

If you have accidentally reversed the battery connections, POSITIVE to NEGATIVE (and vice versa), an ERROR LED (Orange) will illuminate solid. If you see the ERROR LED illuminated, you will need to clear the ERROR by correcting the battery connections, POSITIVE to POSITIVE and NEGATIVE to NEGATIVE. The ERROR LED is a visual diagnostic tool to inform you that you have made the wrong battery connections. Accidentally connecting to the battery in reverse polarity will not cause any damage to the battery charger or battery. This safety feature is enabled even when the AC power plug is unplugged.

When the battery charger detects an ERROR condition, the ERROR LED and CHARGE LED will blink. If you are seeing this ERROR condition, it could be the result of one of the following situations:

• BATTERY VOLTAGE INCOMPATIBILITY
  Check to make sure you have selected the correct charge mode for your battery. For example, if you have a 12V battery, make sure you have selected a 12V charge mode. If you have accidentally selected the wrong charge mode, it could cause this ERROR condition. Select the appropriate charge mode, to resolve this ERROR condition.
  
  
• SULFATED, DAMAGED OR POOR BATTERY
  This ERROR condition can be the result of a sulfated, damaged, or poor battery. To properly diagnose a sulfated, damaged or poor battery, take the battery to a local battery store for an evaluation. If you have checked all other possible ERROR conditions and cannot clear the ERROR, it is probably the result of a sulfated, damaged, or poor battery. For other possible conditions of a sulfated, damaged, or poor battery, see the sections entitled "CHARGE LED IMMEDIATELY ILLUMINATES TO GREEN" and "BATTERY CHARGER MAKING A CLICKING SOUND" below.
  
  
• LOW VOLTAGE BATTERY
  If the battery voltage is below 2.0VDC (6V) or 7.0VDC (12V), it could cause this ERROR condition. See the section entitled "LOW VOLTAGE BATTERY" below to resolve this ERROR condition.
  
  
• HIGH VOLTAGE BATTERY
  If the battery voltage is above 7.0VDC and you have selected 6V charge mode, it could cause this ERROR condition. This ERROR will cause the CHARGE LED and ERROR LED to blink continuously. To resolve this ERROR condition, select 12V charge mode.
  
  
• ABNORMALITY PROTECTION
  This ERROR condition is the result of the battery charger being in the Bulk phase for more than 120 hours. This ERROR condition is the result of a bad battery. To resolve this ERROR condition, take the battery to a local battery store for an evaluation.
  
  

If the battery charger stays in the STANDBY mode and will not change modes, it could be the result of one of the following situations:

• BLOWN FUSE IN BATTERY CONNECTOR HARNESS
  Check the fuse in the battery connector harness. If the fuse in the battery connector harness has blown, it could cause this ERROR condition. Replace the fuse with a 10 amp automotive blade-type fuse to resolve this ERROR condition.
  
  
• CORROSION ON BATTERY TERMINALS
  Check the battery connections for battery corrosion. If battery corrosion is present on the battery connections, it could cause this ERROR condition. Remove the battery corrosion to resolve this ERROR condition.
  
  
• LOOSE BATTERY CONNECTIONS
  Check the battery connections to the battery. If the battery connections are loose, it could cause this ERROR condition. Tighten the battery connections to resolve this ERROR condition.

If the battery charger CHARGE LED immediately illuminate to GREEN when the AC power is applied to the battery charger, the battery is either already fully charged or the battery is in extremely poor condition as a result of sulfation or damage. If the battery is new, the battery is likely already fully charged. If the battery is relatively old and has not been used for a long period of time, the battery is probably so severely damaged that the battery cannot accept any current.

If the battery charger is making a "clicking" sound and will not go into a charge mode, it is probably the result of a battery in extremely poor condition as a result of sulfation or damage. The "clicking" noise you hear does not signify a battery charger failure. "Clicking" noise is the battery charger attempting to enter into a charge mode, but when current is applied to the battery, the battery voltage rises too quickly, and the battery charger shuts off. Once the current is removed from the battery, the battery voltage rapidly decreases, and the battery charger again tries to enter into a charge mode. The "clicking" sound and this ERROR loop condition will continue until the poor battery is removed.

If the battery voltage is below 2.0VDC (6V) or 7.0VDC (12V), the ERROR LED (Orange) and the CHARGE LED (Red) will blink, indicating the battery is out of range for the battery charger. In this situation, the battery charger has determined that the battery voltage is too low to begin a normal charge process. In order to increase the battery voltage to allow the battery charger to begin charging, follow these steps:

• FOR 6V BATTERIES
  If you are trying to charge a 6V battery that is below 2.0VDC, you will need to jump start the battery or connect the battery to a power supply to increase the battery voltage above 2.0VDC to begin the charge cycle.
  
  
• FOR 12V BATTERIES
  If you are trying to charge a 12V battery that is below 7.0VDC, switch the battery charger into 6V charge mode to begin charging a low voltage 12V battery. When the CHARGE LED turns from Red to Green, the battery voltage will be above 7.0VDC and you can return the battery charger back to the 12V charge mode.

Before applying AC power to the charger, measure the battery with a digital volt meter and write the value down. Then plug the charger in making sure that within 5 seconds the charger is indicating that the charging process has begun . Wait 30 seconds and measure the battery again with the digital volt meter. The battery voltage should be higher and slowly moving up.

If you have accidentally reversed the battery connections, POSITIVE to NEGATIVE (and vice versa), an ERROR LED (Orange) will illuminate solid. If you see the ERROR LED illuminated, you will need to clear the ERROR by correcting the battery connections, POSITIVE to POSITIVE and NEGATIVE to NEGATIVE. The ERROR LED is a visual diagnostic tool to inform you that you have made the wrong battery connections. Accidentally connecting to the battery in reverse polarity will not cause any damage to the battery charger or battery. This safety feature is enabled even when the AC power plug is unplugged.

When the battery charger detects an ERROR condition, the ERROR LED and CHARGE LEDs (25%, 50%, 75%, 100%) will blink. If you are seeing this ERROR condition, it could be the result of one of the following situations:

• BATTERY VOLTAGE INCOMPATIBILITY
  Check to make sure you have selected the correct charge mode for your battery. For example, if you have a 12V battery, make sure you have selected a 12V charge mode. If you have accidentally selected the wrong charge mode, it could cause this ERROR condition. Select the appropriate charge mode to resolve this ERROR condition.
  
  
• SULFATED, DAMAGED OR POOR BATTERY
  This ERROR condition can be the result of a sulfated, damaged or poor battery. To properly diagnose a sulfated, damaged, or poor battery, take the battery to a local battery store for an evaluation. If you have checked all other possible ERROR conditions and cannot clear the ERROR, it is probably the result of a sulfated, damaged, or poor battery. For other possible conditions of a sulfated, damaged, or poor battery, see the sections entitled "CHARGE LEDs FULLY ILLUMINATE IMMEDIATELY" and "BATTERY CHARGER MAKING A CLICKING SOUND" below.
  
  
• LOW VOLTAGE BATTERY
  If the battery voltage is below 2.0VDC (6V) or 7.0VDC (12V), it could cause this ERROR condition. See the section entitled "LOW VOLTAGE BATTERY" below to resolve this ERROR condition.
  
  
• HIGH VOLTAGE BATTERY
  If the battery voltage is above 7.0VDC and you have selected 6V charge mode, it could cause this ERROR condition. This ERROR will cause the CHARGE LED and ERROR LED to blink continuously. To resolve this ERROR condition, select 12V charge mode.
  
  
• ABNORMALITY PROTECTION
  This ERROR condition is the result of the battery charger being in the Bulk mode for more than 96 hours. This ERROR condition is the result of a bad battery. To resolve this ERROR condition, take the battery to a local battery store for an evaluation.
  
  

If the battery charger stays in the STANDBY mode and will not change modes, it could be the result of one of the following situations:

• BLOWN FUSE IN BATTERY CONNECTOR HARNESS
  Check the fuse in the battery connector harness. If the fuse in the battery connector harness has blown, it could cause this ERROR condition. Replace the fuse with a 10 amp automotive blade-type fuse to resolve this ERROR condition.
  
  
• CORROSION ON BATTERY TERMINALS
  Check the battery connections for battery corrosion. If battery corrosion is present on the battery connections, it could cause this ERROR condition. Remove the battery corrosion to resolve this ERROR condition.
  
  
• LOOSE BATTERY CONNECTIONS
  Check the battery connections to the battery. If the battery connections are loose, it could cause this ERROR condition. Tighten the battery connections to resolve this ERROR condition.

If the battery charger CHARGE LEDs immediately illuminate to 100% when the AC power is applied to the battery charger, the battery is either already fully charged or the battery is in extremely poor condition as a result of sulfation or damage. If the battery is new, the battery is likely already fully charged. If the battery is relatively old and had not been used for a long period of time, the battery is probably so severely damaged that the battery cannot accept any current.

If the battery charger is making a "clicking" sound and will not go into a charge mode, it is probably the result of a battery in extremely poor condition as a result of sulfation or damage. The "clicking" noise you hear does not signify a battery charger failure. The "clicking" noise is the battery charger attempting to enter into a charge mode, but when current is applied to the battery, the battery voltage rises too quickly, and the battery charger shuts off. Once the current is removed from the battery, the battery voltage rapidly decreases, and the battery charger again tries to enter into a charge mode. The "clicking" sound and this ERROR loop condition will continue until the poor battery is removed.

If the battery voltage is below 2.0VDC (6V) or 7.0VDC (12V), the ERROR LED (Orange) and the CHARGE LEDs (25%, 50%, 75%, and 100%) will blink, indicating the battery is out of range for the battery charger. In this situation, the battery charger has determined that the battery voltage is too low to begin a normal charge mode. In order to increase the battery voltage to allow the battery charger to begin charging, follow these steps:

• FOR 6V BATTERIES
  If you are trying to charge a 6V battery that is below 2.0VDC, you will need to jump start the battery or connect the battery to a power supply to increase the battery voltage above 2.0VDC to begin the charge cycle.
  
  
• FOR 12V BATTERIES
  If you are trying to charge a 12V battery that is below 7.0VDC, switch the battery charger into 6V mode to begin charging a low voltage 12V battery. Choose either 6V NORM mode for Wet Cell, MF, or Gel Cell batteries or 6V COLD/AGM mode for AGM batteries. When the 100% CHARGE LED turns to a solid (not blinking) Green, the battery voltage will be above 7.0VDC and you can return the battery charger back to the appropriate 12V charge mode, depending on the chemistry of your battery, to begin the charge cycle.

Before applying AC power to the charger, measure the battery with a digital volt meter and write the value down. Then plug the charger in making sure that within 5 seconds the charger is indicating that the charging process has begun . Wait 30 seconds and measure the battery again with the digital volt meter. The battery voltage should be higher and slowly moving up.

If you have accidentally reversed the battery connections, POSITIVE to NEGATIVE (and vice versa), an ERROR LED (Orange) will illuminate solid. If you see the ERROR LED illuminated, you will need to clear the ERROR by correcting the battery connections, POSITIVE to POSITIVE and NEGATIVE to NEGATIVE. The ERROR LED is a visual diagnostic tool to inform you that you have made the wrong battery connections. Accidentally connecting to the battery in reverse polarity will not cause any damage to the battery charger or battery. This safety feature is enabled even when the AC power plug is unplugged.

When the battery charger detects an ERROR condition, the ERROR LED and CHARGE LEDs (25%, 50%, 75%, 100%) will blink. If you are seeing this ERROR condition, it could be the result of one of the following situations:

• BATTERY VOLTAGE INCOMPATIBILITY
  Check to make sure you have selected the correct charge mode for your battery. For example, if you have a 12V battery, make sure you have selected a 12V charge mode. If you have accidentally selected the wrong charge mode, it could cause this ERROR condition. Select the appropriate charge mode to resolve this ERROR condition.
  
  
• SULFATED, DAMAGED OR POOR BATTERY
  This ERROR condition can be the result of a sulfated, damaged or poor battery. To properly diagnose a sulfated, damaged, or poor battery, take the battery to a local battery store for an evaluation. If you have checked all other possible ERROR conditions and cannot clear the ERROR, it is probably the result of a sulfated, damaged, or poor battery. For other possible conditions of a sulfated, damaged, or poor battery, see the sections entitled "CHARGE LEDs FULLY ILLUMINATE IMMEDIATELY" and "BATTERY CHARGER MAKING A CLICKING SOUND" below.
  
  
• LOW VOLTAGE BATTERY
  If the battery voltage is below 2.0VDC (6V) or 7.0VDC (12V), it could cause this ERROR condition. See the section entitled "LOW VOLTAGE BATTERY" below to resolve this ERROR condition.
  
  
• HIGH VOLTAGE BATTERY
  If the battery voltage is above 7.0VDC and you have selected 6V charge mode, it could cause this ERROR condition. This ERROR will cause the CHARGE LED and ERROR LED to blink continuously. To resolve this ERROR condition, select 12V charge mode.
  
  
• ABNORMALITY PROTECTION
  This ERROR condition is the result of the battery charger being in the Bulk mode for more than 48 hours. This ERROR condition is the result of a bad battery. To resolve this ERROR condition, take the battery to a local battery store for an evaluation.
  
  

If the battery charger stays in the STANDBY mode and will not change modes, it could be the result of one of the following situations:

• BLOWN FUSE IN BATTERY CONNECTOR HARNESS
  Check the fuse in the battery connector harness. If the fuse in the battery connector harness has blown, it could cause this ERROR condition. Replace the fuse with a 10 amp automotive blade-type fuse to resolve this ERROR condition.
  
  
• CORROSION ON BATTERY TERMINALS
  Check the battery connections for battery corrosion. If battery corrosion is present on the battery connections, it could cause this ERROR condition. Remove the battery corrosion to resolve this ERROR condition.
  
  
• LOOSE BATTERY CONNECTIONS
  Check the battery connections to the battery. If the battery connections are loose, it could cause this ERROR condition. Tighten the battery connections to resolve this ERROR condition.

If the battery charger CHARGE LEDs immediately illuminate to 100% when the AC power is applied to the battery charger, the battery is either already fully charged or the battery is in extremely poor condition as a result of sulfation or damage. If the battery is new, the battery is likely already fully charged. If the battery is relatively old and had not been used for a long period of time, the battery is probably so severely damaged that the battery cannot accept any current.

If the battery charger is making a "clicking" sound and will not go into a charge mode, it is probably the result of a battery in extremely poor condition as a result of sulfation or damage. The "clicking" noise you hear does not signify a battery charger failure. The "clicking" noise is the battery charger attempting to enter into a charge mode, but when current is applied to the battery, the battery voltage rises too quickly, and the battery charger shuts off. Once the current is removed from the battery, the battery voltage rapidly decreases, and the battery charger again tries to enter into a charge mode. The "clicking" sound and this ERROR loop condition will continue until the poor battery is removed.

If the battery voltage is below 2.0VDC (6V) or 7.0VDC (12V), the ERROR LED (Orange) and the CHARGE LEDs (25%, 50%, 75%, and 100%) will blink, indicating the battery is out of range for the battery charger. In this situation, the battery charger has determined that the battery voltage is too low to begin a normal charge mode. In order to increase the battery voltage to allow the battery charger to begin charging, follow these steps:

• FOR 6V BATTERIES
  If you are trying to charge a 6V battery that is below 2.0VDC, you will need to jump start the battery or connect the battery to a power supply to increase the battery voltage above 2.0VDC to begin the charge cycle.
  
  
• FOR 12V BATTERIES (1.2-14Ah)
  If you are trying to charge a 12V battery that is below 7.0VDC, switch the battery charger into 6V mode to begin charging a low voltage 12V battery. Choose either 6V SMALL NORM mode for Wet Cell, MF, or Gel Cell batteries or 6V SMALL COLD/AGM mode for AGM batteries. When the 100% CHARGE LED turns to a solid (not blinking) Green, the battery voltage will be above 7.0VDC and you can return the battery charger back to the appropriate 12V SMALL charge mode, depending on the chemistry of your battery, to begin the charge cycle.
  
  
• FOR 12V BATTERIES (14-120Ah)
  If you are trying to charge a 12V battery that is below 7.0VDC, switch the battery charger into 6V mode to begin charging a low voltage 12V battery. Depending on the chemistry of your battery, choose 6V NORM mode for Wet Cell or Gel Cell batteries or 6V COLD/AGM mode for AGM batteries. When the 100% CHARGE LED turns to a solid (not blinking) Green, the battery voltage will be above 7.0VDC and you can return the battery charger back to the appropriate 12V charge mode, depending on the chemistry of your battery, to begin the charge cycle.

Before applying AC power to the charger, measure the battery with a digital volt meter and write the value down. Then plug the charger in making sure that within 5 seconds the charger is indicating that the charging process has begun . Wait 30 seconds and measure the battery again with the digital volt meter. The battery voltage should be higher and slowly moving up.

If you have accidentally reversed the battery connections, POSITIVE to NEGATIVE (and vice versa), an ERROR LED (Orange) will illuminate solid. If you see the ERROR LED illuminated, you will need to clear the ERROR by correcting the battery connections, POSITIVE to POSITIVE and NEGATIVE to NEGATIVE. The ERROR LED is a visual diagnostic tool to inform you that you have made the wrong battery connections. Accidentally connecting to the battery in reverse polarity will not cause any damage to the battery charger or battery. This safety feature is enabled even when the AC power plug is unplugged.

When the battery charger detects an ERROR condition, the ERROR LED and CHARGE LEDs (25%, 50%, 75%, 100%) will blink. If you are seeing this ERROR condition, it could be the result of one of the following situations:

• BATTERY VOLTAGE INCOMPATIBILITY
  Check to make sure you have selected the correct charge mode for your battery. For example, if you have a 12V battery, make sure you have selected a 12V charge mode. If you have accidentally selected the wrong charge mode, it could cause this ERROR condition. Select the appropriate charge mode to resolve this ERROR condition.
  
  
• SULFATED, DAMAGED OR POOR BATTERY
  This ERROR condition can be the result of a sulfated, damaged or poor battery. To properly diagnose a sulfated, damaged, or poor battery, take the battery to a local battery store for an evaluation. If you have checked all other possible ERROR conditions and cannot clear the ERROR, it is probably the result of a sulfated, damaged, or poor battery. For other possible conditions of a sulfated, damaged, or poor battery, see the sections entitled "CHARGE LEDs FULLY ILLUMINATE IMMEDIATELY" and "BATTERY CHARGER MAKING A CLICKING SOUND" below.
  
  
• LOW VOLTAGE BATTERY
  If the battery voltage is below 7.0VDC (12V) or 14.0VDC (24V), it could cause this ERROR condition. See the section entitled "LOW VOLTAGE BATTERY" below to resolve this ERROR condition.
  
  
• HIGH VOLTAGE BATTERY
  If the battery voltage is above 14.0VDC and you have selected 12V charge mode, it could cause this ERROR condition. This ERROR will cause the CHARGE LED and ERROR LED to blink continuously. To resolve this ERROR condition, select 24V charge mode.
  
  
• ABNORMALITY PROTECTION
  This ERROR condition is the result of the battery charger being in the Bulk mode for more than 41 hours. This ERROR condition is the result of a bad battery. To resolve this ERROR condition, take the battery to a local battery store for an evaluation.
  
  

If the battery charger stays in the STANDBY mode and will not change modes, it could be the result of one of the following situations:

• BLOWN FUSE IN BATTERY CONNECTOR HARNESS
  Check the fuse in the battery connector harness. If the fuse in the battery connector harness has blown, it could cause this ERROR condition. Replace the fuse with a 10 amp automotive blade-type fuse to resolve this ERROR condition.
  
  
• CORROSION ON BATTERY TERMINALS
  Check the battery connections for battery corrosion. If battery corrosion is present on the battery connections, it could cause this ERROR condition. Remove the battery corrosion to resolve this ERROR condition.
  
  
• LOOSE BATTERY CONNECTIONS
  Check the battery connections to the battery. If the battery connections are loose, it could cause this ERROR condition. Tighten the battery connections to resolve this ERROR condition.

If the battery charger CHARGE LEDs immediately illuminate to 100% when the AC power is applied to the battery charger, the battery is either already fully charged or the battery is in extremely poor condition as a result of sulfation or damage. If the battery is new, the battery is likely already fully charged. If the battery is relatively old and had not been used for a long period of time, the battery is probably so severely damaged that the battery cannot accept any current.

If the battery charger is making a "clicking" sound and will not go into a charge mode, it is probably the result of a battery in extremely poor condition as a result of sulfation or damage. The "clicking" noise you hear does not signify a battery charger failure. The "clicking" noise is the battery charger attempting to enter into a charge mode, but when current is applied to the battery, the battery voltage rises too quickly, and the battery charger shuts off. Once the current is removed from the battery, the battery voltage rapidly decreases, and the battery charger again tries to enter into a charge mode. The "clicking" sound and this ERROR loop condition will continue until the poor battery is removed.

If the battery voltage is below 7.0VDC (12V) or 14.0VDC (24V), the ERROR LED (Orange) and the CHARGE LEDs (25%, 50%, 75%, and 100%) will blink, indicating the battery is out of range for the battery charger. In this situation, the battery charger has determined that the battery voltage is too low to begin a normal charge mode. In order to increase the battery voltage to allow the battery charger to begin charging, follow these steps:

• FOR 12V BATTERIES
  If you are trying to charge a 12V battery that is below 7.0VDC, you will need to select the 13.6V SUPPLY mode. The 13.6V SUPPLY mode is for 12V batteries ONLY. In this mode, the battery charger does not use battery voltage as a restriction to begin applying current. Before selecting the 13.6V SUPPLY mode, make sure you understand how to use this charge mode by reading "USING 13.6V SUPPLY MODE" in the manual. As a standard matter of practice, allow the battery charger to charge the battery in this mode for at least sixty (60) minutes. After the elapsed time, the battery voltage should be above 7.0VDC. Press the MODE button one (1) time to exit the 13.6V SUPPLY mode and return the battery charger to STANDBY mode. Return the battery charger back to the appropriate 12V charge mode, depending on the chemistry of your battery, to begin the charge cycle.
  
  
• FOR 24V BATTERIES
  If you are trying to charge a 24V battery that is below 14.0VDC you will need to select the 13.6V SUPPLY mode. The 13.6V SUPPLY mode is for 12V batteries ONLY. If your battery system is comprised of two (2) 12V batteries in series, you can follow the instructions given above in the ‘For 12V Batteries’ section and charge each individual 12V battery independently until the combined battery voltage exceeds 14.0VDC. Return the battery charger back to the appropriate 24V charge mode, depending on the chemistry of your battery, to begin the charge cycle. IF YOUR 24V BATTERY SYSTEM IS COMPRISED OF SOMETHING OTHER THAN TWO (2) 12V BATTERIES, THEN YOU WILL NEED TO JUMP START THE BATTERY.

Before applying AC power to the charger, measure the battery with a digital volt meter and write the value down. Then plug the charger in making sure that within 5 seconds the charger is indicating that the charging process has begun . Wait 30 seconds and measure the battery again with the digital volt meter. The battery voltage should be higher and slowly moving up.

If you have accidentally reversed the battery connections, POSITIVE to NEGATIVE (and vice versa), an ERROR LED (Orange) will illuminate solid. If you see the ERROR LED illuminated, you will need to clear the ERROR by correcting the battery connections, POSITIVE to POSITIVE and NEGATIVE to NEGATIVE. The ERROR LED is a visual diagnostic tool to inform you that you have made the wrong battery connections. Accidentally connecting to the battery in reverse polarity will not cause any damage to the battery charger or battery. This safety feature is enabled even when the AC power plug is unplugged.

When the battery charger detects an ERROR condition, the ERROR LED and CHARGE LEDs (25%, 50%, 75%, 100%) will blink. If you are seeing this ERROR condition, it could be the result of one of the following situations:

• BATTERY VOLTAGE INCOMPATIBILITY
  Check to make sure you have selected the correct charge mode for your battery. For example, if you have a 12V battery, make sure you have selected a 12V charge mode. If you have accidentally selected the wrong charge mode, it could cause this ERROR condition. Select the appropriate charge mode to resolve this ERROR condition.
  
  
• SULFATED, DAMAGED OR POOR BATTERY
  This ERROR condition can be the result of a sulfated, damaged or poor battery. To properly diagnose a sulfated, damaged, or poor battery, take the battery to a local battery store for an evaluation. If you have checked all other possible ERROR conditions and cannot clear the ERROR, it is probably the result of a sulfated, damaged, or poor battery. For other possible conditions of a sulfated, damaged, or poor battery, see the sections entitled "CHARGE LEDs FULLY ILLUMINATE IMMEDIATELY" and "BATTERY CHARGER MAKING A CLICKING SOUND" below.
  
  
• LOW VOLTAGE BATTERY
  If the battery voltage is below 7.0VDC (12V) or 14.0VDC (24V), it could cause this ERROR condition. See the section entitled "LOW VOLTAGE BATTERY" below to resolve this ERROR condition.
  
  
• HIGH VOLTAGE BATTERY
  If the battery voltage is above 14.0VDC and you have selected 12V charge mode, it could cause this ERROR condition. This ERROR will cause the CHARGE LED and ERROR LED to blink continuously. To resolve this ERROR condition, select 24V charge mode.
  
  
• ABNORMALITY PROTECTION
  This ERROR condition is the result of the battery charger being in the Bulk mode for more than 41 hours. This ERROR condition is the result of a bad battery. To resolve this ERROR condition, take the battery to a local battery store for an evaluation.
  
  

If the battery charger stays in the STANDBY mode and will not change modes, it could be the result of one of the following situations:

• BLOWN FUSE IN BATTERY CONNECTOR HARNESS
  Check the fuse in the battery connector harness. If the fuse in the battery connector harness has blown, it could cause this ERROR condition. Replace the fuse with a 40 amp automotive blade-type fuse to resolve this ERROR condition.
  
  
• CORROSION ON BATTERY TERMINALS
  Check the battery connections for battery corrosion. If battery corrosion is present on the battery connections, it could cause this ERROR condition. Remove the battery corrosion to resolve this ERROR condition.
  
  
• LOOSE BATTERY CONNECTIONS
  Check the battery connections to the battery. If the battery connections are loose, it could cause this ERROR condition. Tighten the battery connections to resolve this ERROR condition.

If the battery charger CHARGE LEDs immediately illuminate to 100% when the AC power is applied to the battery charger, the battery is either already fully charged or the battery is in extremely poor condition as a result of sulfation or damage. If the battery is new, the battery is likely already fully charged. If the battery is relatively old and had not been used for a long period of time, the battery is probably so severely damaged that the battery cannot accept any current.

If the battery charger is making a "clicking" sound and will not go into a charge mode, it is probably the result of a battery in extremely poor condition as a result of sulfation or damage. The "clicking" noise you hear does not signify a battery charger failure. The "clicking" noise is the battery charger attempting to enter into a charge mode, but when current is applied to the battery, the battery voltage rises too quickly, and the battery charger shuts off. Once the current is removed from the battery, the battery voltage rapidly decreases, and the battery charger again tries to enter into a charge mode. The "clicking" sound and this ERROR loop condition will continue until the poor battery is removed.

If the battery voltage is below 7.0VDC (12V) or 14.0VDC (24V), the ERROR LED (Orange) and the CHARGE LEDs (25%, 50%, 75%, and 100%) will blink, indicating the battery is out of range for the battery charger. In this situation, the battery charger has determined that the battery voltage is too low to begin a normal charge mode. In order to increase the battery voltage to allow the battery charger to begin charging, follow these steps:

• FOR 12V BATTERIES
  If you are trying to charge a 12V battery that is below 7.0VDC, you will need to select the 13.6V SUPPLY mode. The 13.6V SUPPLY mode is for 12V batteries ONLY. In this mode, the battery charger does not use battery voltage as a restriction to begin applying current. Before selecting the 13.6V SUPPLY mode, make sure you understand how to use this charge mode by reading "USING 13.6V SUPPLY MODE" in the manual. As a standard matter of practice, allow the battery charger to charge the battery in this mode for at least sixty (60) minutes. After the elapsed time, the battery voltage should be above 7.0VDC. Press the MODE button one (1) time to exit the 13.6V SUPPLY mode and return the battery charger to STANDBY mode. Return the battery charger back to the appropriate 12V charge mode, depending on the chemistry of your battery, to begin the charge cycle.
  
  
• FOR 24V BATTERIES
  If you are trying to charge a 24V battery that is below 14.0VDC you will need to select the 13.6V SUPPLY mode. The 13.6V SUPPLY mode is for 12V batteries ONLY. If your battery system is comprised of two (2) 12V batteries in series, you can follow the instructions given above in the ‘For 12V Batteries’ section and charge each individual 12V battery independently until the combined battery voltage exceeds 14.0VDC. Return the battery charger back to the appropriate 24V charge mode, depending on the chemistry of your battery, to begin the charge cycle. IF YOUR 24V BATTERY SYSTEM IS COMPRISED OF SOMETHING OTHER THAN TWO (2) 12V BATTERIES, THEN YOU WILL NEED TO JUMP START THE BATTERY.

Before applying AC power to the charger, measure the battery with a digital volt meter and write the value down. Then plug the charger in making sure that within 5 seconds the charger is indicating that the charging process has begun . Wait 30 seconds and measure the battery again with the digital volt meter. The battery voltage should be higher and slowly moving up.

When the battery charger detects an ERROR condition, the ERROR LEDs will flash back and forth. If you are seeing this ERROR condition, it could be the result of one of the following situations:

• BATTERY VOLTAGE INCOMPATIBILITY
  Check to make sure you have a 12V battery. This battery charger is for 12V batteries only. If you attempting to charge a battery that is otherthan 12V, it could cause this ERROR condition. Charge the appropriate battery to resolve this ERROR condition.
  
  
• SULFATED, DAMAGED OR POOR BATTERY
  This ERROR condition can be the result of a sulfated, damaged or poor battery. To properly diagnose a sulfated, damaged, or poor battery, take the battery to a local battery store for an evaluation. If you have checked all other possible ERROR conditions and cannot clear the ERROR, it is probably the result of a sulfated, damaged, or poor battery.
  
  
• LOW VOLTAGE BATTERY
  If the battery voltage is below 2.0VDC (12V), it could cause this ERROR condition. See the section entitled "LOW VOLTAGE BATTERY" below to resolve this ERROR condition.
  
  
• ABNORMALITY PROTECTION
  This ERROR condition is the result of the battery charger being in the Bulk mode for more than 20 hours. This ERROR condition is the result of a bad battery. To resolve this ERROR condition, take the battery to a local battery store for an evaluation.
  
  
• BLOWN FUSE IN BATTERY CONNECTOR HARNESS
  Check the fuse in the battery connector harness. If the fuse in the battery connector harness has blown, it could cause this ERROR condition. Replace the fuse with a 15A 8AG fuse to resolve this ERROR condition.
  
  
• CORROSION ON BATTERY TERMINALS
  Check the battery connections for battery corrosion. If battery corrosion is present on the battery connections, it could cause this ERROR condition. Remove the battery corrosion to resolve this ERROR condition.
  
  
• LOOSE BATTERY CONNECTIONS
  Check the battery connections to the battery. If the battery connections are loose, it could cause this ERROR condition. Tighten the battery connections to resolve this ERROR condition.

If the battery voltage is below 2.0VDC (12V), an ERROR conditon will occur and the CHARGE LEDs will flash back and forth, indicating the battery is out of range for the battery charger. In this situation, the battery charger has determined that the battery voltage is too low to begin a normal charge cycle. To increase the battery voltage and allow the battery charger to begin charging, you will need to jump start the battery.

Before applying AC power to the charger, measure the battery voltage with a digital voltmeter and write the value down. Plug the battery charger into an electrical outlet. Wait at least thirty (30) seconds and measure the battery voltage again with the digital voltmeter. The battery voltage should be higher than the previous value and slowly moving up.