FeaturesCharge and maintain 6V / 12V lead acid batteriesSwitch from charge to maintain mode automaticallyLCD display shows charge status and selected modesProtects against short-circuits & polarity inversionWater & dust resistant (IP65)Avoid a battery failure and extend the lifespan of your 6V or 12V battery with the Stanley 6-12V 4A Battery Charger. The charger will recover and charge until your battery reaches optimal voltage, then automatically switches to maintain charge, keeping the battery level at 100%.