Most advanced high-power lithium iron phosphate battery technology from BikeMaster Ultra high cranking amps from a superweight battery which makes it 1/3 the weight of a lead acid battery Cylindrical cell with energy storage welding technology for higher output Built-in charge and equalizing protection board which prevents battery from over-charging Remarkably low self-discharge or extended storage periods up to one year Suitable for low temperature environments More than twice the service life of conventional lead acid batteries Superior vibration resistant construction allows multi-directional installation without damage No corrosive liquids and no toxic heavy metals which makes it environmentally friendly 2 year warranty Note: Requires specific lithium ion battery charger/maintainer, 805-180, sold separately