Just a few moments spent regularly checking your battery can help prolong its life saving you money in the future the voltcraft vcw 12000 car battery charger is suitable for 6 to 120 ah batteries and you can choose between 3 different charging currents 2 6 and 12a the easy to read digital display offers clear and concise information once your battery is fully charged the charger automatically switches to trickle charging trickle charging provides a low level electrical charge to your