The Braille AGM battery is a no-spill, no-corrosion design and its small size and weight allows you to put it where you need to. At under 22 pounds, the B3121 is the lightest do-eveything battery on the market. Braille has put a lot of power into this very small package. It provides longer service life with lighter weight. No corrosion, no spill, no maitenance AGM design. Dual terminals allows flexible mounting options. Heli-coil stainless steel threads allow higher bolt torque for a secure cable connection under extreme vibration. Useable for all Group Sizes.