Expands runtime and quickly restores full backup power with Fast Charge Technology BATTERY EQUALIZATION TECHNOLOGY (BET): an advanced charging process that maintains the voltages of the batteries at the same level to increase battery life 2U Rack/Tower Convertible Form Factor ; Compatible with the following Smart App Sinewave UPS systems: PR750RTXL2U and PR1000RTXL2U Can be replaced without powering down vital equipment and toolless battery panel access makes battery replacement fast and simple Included components: Extended Battery Module, Faceplate, User Manual, Rack Mounting Kit, Tower Mounting Kit, BM Cable, and (2) IEC C13-C14 Cables