OptiMate 3+ battery saving charger-maintainer OptiMate 3+ battery Saving Charger-Tester-Maintainer for motorcycle batteries with 6 step program includes 2V low voltage start, desulfation mode, bulk and verification charge and OptiMate maintenance program Ventless Splashproof enclosure with integrated wall mounts, heavy duty cables and OptiMate SAE connector and O1 weatherproof fused battery cable and O4 battery clip accessories PROVEN Save neglected / sulfated 12V batteries other chargers can't from as low as 2 Volts, most effective when battery is disconnected from the vehicle wiring as it shuts down high voltage desulfation if wiring is sensed Extends battery life up to 400% if you hook it up every time you park the vehicle / craft with continuous low current desulfating pulse that prevents sulfation from reforming The original OptiMate battery optimizer saving batteries since 1995 and recommended by 10 major motorcycle/leisure vehicle manufacturers