OptiMate 3 desulfater-charger saves neglected, deep discharged batteries other smart chargers can't! Safely maintains battery during long term storage.
Hook up the battery and OptiMate immediately checks if the battery is sulfated or not. If it is, OptiMate applies first aid in the form of a voltage up to 22V** at low current for up to 2 hours, to recover the battery so it can again accept a charge. It then 'bulk' (constant current) charges the battery, the starting stage if no sulfation was detected. There-after the unique 'verification' (pulsing charge and check) stage provides low voltage desulfating care and tops off the charge. OptiMate then tests and confirms whether the battery can retain sufficient charge to crank an engine before it engages long term maintenance mode. During maintenance it floats and tests 30 minutes on, 30 minutes off, so the battery is always 100% ready, but never overcharged.
**The OptiMate's high voltage desulfation mode cannot engage if vehicle electronics / wiring are sensed, so to effectively desulfate a battery, it must be disconnected from the vehicle's wiring.