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http://www.ballisticparts.com/tech/charging.php
CHARGING INSTRUCTIONS
Congratulations on your purchase of a Ballistic Performance Components EVO2 Battery! Your new battery comes charged and is ready to install. EVO2 batteries are very different in chemistry, construction, and behavior than a traditional lead-acid battery. Here are somethings to consider while using your EVO2 battery:
Maximum Voltage: 14.4 volts
Minimum Charged Voltage: 13.2 volts
Charged Resting Voltage: 13.2 volts – 13.7 volts.
Minimum Voltage: 9 volts
Standard Charge Rate Specifications: 2amps @ 13.2 volts until the battery reaches a maximum voltage of 14.4 volts
Storage:
The EVO2 battery will not discharge like a traditional lead-acid battery so unless your powersports vehicle has a parasitic draw (like an alarm), there is no need to use maintenance charger. If your bike does have a parasitic draw then you can use a maintenance charger for storage or simply disconnect the negative terminal from the battery. We make a Quick Disconnect Kit (300-002 $49.95) to make disconnecting the EVO2 for extended storage as easy as possible. If left static (nothing drawing from the battery) an EVO2 will discharge at a rate of around 10% per year.
Charging:
The best method for charging your EVO2 battery is to use the Ballistic Professional Intelligent Digital Balance Charger. It has a fast charge mode, a storage mode, and the ability to charge each cell or series individually. This Balance mode, when used periodically will greatly extend the life of the EVO2 battery.
You can use a conventional automotive or motorcycle based charger to recharge or maintain your EVO2 Battery. When using a conventional charger/trickle charge please check the following:
The charger should have an automatic cut-off at 14.4V to prevent over charging.
If you are using an automatic charger, be sure it does not have an automatic “desulfication” mode. This is a lead-acid specific function that can damage the EVO2 cells.
Some conventional automatic chargers have charging parameters based around lead-acid voltage specifications which are lower than EVO2 voltage specifications. If your automatic charger shuts off at 12.8 volts then it will never fully charge a EVO2 battery with a resting voltage of 13.2v