Power + Maintenance Free Batteries are revolutionizing the way we power our back-up systems. Simply connect a battery or batteries to your back-up system and then forget about it. The 120 AMP Power + battery is completely sealed and spill-proof with no risk of exposure to hazardous chemicals. It is safe for standard shipping anywhere in the U.S. and works with virtually all types of back-up systems; often performing up to 35% better than standard deep cycle batteries.