HEBANG 12V 1A Lead-acid Battery Charger Car Electric Bicycle Quad Van Motorcycle Battery Trickle Charger Charger can automatically detect the battery, the faulty battery does not charge Automatic charging without over charging, Short Circuit Protection, Over Current Protection, Battery Polarity Reversal Constant current constant voltage charging When the battery is full, automatically converted to float charge mode, don't have to worry about charging time is too long damage to the battery