This NPower charger/maintainer provides the power and functionality of a charger, but also includes a 75 Amp jumpstarter that brings batteries back to life. The automatic charger/maintainer keeps 12V batteries charged while maintaining top performance. Can easily be set at 4, 12 or 25 Amp charge rate, or the user can simply choose automatic setting. Includes a 2 Amp battery maintainer option that maintains charge in stored batteries without having to disconnect battery. Simply plug in provided maintainer cables into charging port.