APC RBC63 300VAh UPS Replacement Battery Cartridge #63 - 48V DC - Spill Proof, Maintenance Free Sealed Lead Acid

Intelligent battery management - Maximizes battery performance, life, and reliability through intelligent, precision charging. Temperature-compensated battery charging - Prolongs battery life by regulating the charge voltage according to battery temperature. Battery replacement without tools - Enables fast battery replacement, lowering Mean Time to Repair (MTTR). Disconnected battery notification - Warns when a battery is not available to provide backup power.