The OptiMate 5 Select is the all-in-one tool for 6 V and 12 V battery maintenance for medium to large batteries. The Optimate 5 VoltMatic performs things like diagnosis, repair, charging, testing and optimal maintenance automatically. The OptiMate 5 Select has a powerful 6V 4A and 12V 2.8A output to charge and maintain batteries. The charger handles smaller or medium batteries from 7.5 Ah up to 120 Ah very well. Is your battery in bad shape? No worries! The OptiMate 5 Select will restore it from almost full discharge (from 1 Volt) and recharge it as optimally as possible. Next, the smart charger checks whether the charge obtained is optimal. The Optimate 5 Select further tests how well the battery holds the charge. The status is clearly visible on the LEDs on the charger. The battery will then be safely maintained (for months) in a fully charged state. This will extend the life of your battery by up to 400%. This means less waste, less cost for you and it makes for a better environment.