The Tusk Lithium Pro battery is a high-power . compact battery designed for motorcycles . ATV's . and UTV's. These batteries feature high power lithium iron phosphate (LiFePO4) cell technology that is extremely lightweight (1/3 the weight of traditional lead/acid batteries). These performance batteries offer a long service life (twice that of lead/acid batteries) and have little to no corrosive liquids or toxic heavy metals (they can be installed in any direction).