The Vision X Pulse Charger can revive lost battery capacity on batteries up to 32 AMP hours in size and charge batteries up to 120 AMP hours. The charger is fully automatic and restores the battery to its original capacity. The auto shut off feature makes it so you can leave the smart charger attached to your battery indefinitely. By constantly monitoring the battery voltage and only charging the battery when the voltage drops below fully charged levels, there is no risk of damaging the battery or overheating the charger.