YTX9-BS 9BS Lithium Ion Sealed Powersports Battery 12V 300CCA Motorcycle Scooter ATV - Factory Activated, Maintenance Free (MMG4) Less volume and weight: 1/3 of normal lead-acid battery Exceptional cycle life: more than 2000 cycles under JISD standard (lead-acid battery 150-300 cycles). No maintenance needed for almost a year. No pollution: safe for the environment. Does not contain any acid and heavy metals such as lead, cadmium, or mercury Incredibly fast recharge rate