Every garage needs an Attwood 2/6 Amp Marine and Automotive Battery Charger. This charger is compatible with 6-volt and 12-volt batteries and is protected from short circuiting and reverse polarity for safe use and peace of mind. When your battery is full, the charge automatically slows to a trickle to prevent overcharging. The onboard LED power and ammeter charge indicators keep you in the loop, and the 6-foot power cord allows flexible use.