OptiMate™ 5 voltmatic BATTERY CHARGER OptiMate™ 5 voltmatic is the first ever charger capable of automatically recovering 6V lead-acid batteries from deep discharge (low voltage 12V batteries need confirmation from the user that it is a 12V battery). Then the recovered 6 or 12V battery is optimally recharged, tested and then safely maintained For months at a time. The unique OptiMate long term maintenance charge method not only keeps the battery at 100% without ever over-charging, it also has been proven to prolong battery life by up to 400%. Reducing waste, For a better environment. No wonder 10 major constructors recommend OptiMate. OptiMate™ 5 voltmatic. Battery performance guaranteed!