Parts Unlimited has made a premium-quality, maintenance-free battery at a low price. Get up to three times longer battery life than conventional batteries. Don't worry about water loss. When filled with acid the absorbed-glass mat battery permanently seals.; Battery seals to prevent water loss Acid pack included Holds a charge up to three times longer than conventional batteries Dimensions: 6" L x 2-3/4" W x 5-3/4" H Amp hours: 12