The CyberPower BP48VL2U01 is a 48VDC Extended Battery Module (EBM) designed to extend the runtime of the CyberPower OL3KRTHD UPS during power outages. Featuring eight 12V/9Ah sealed lead-acid batteries, this 2U rack/tower convertible module provides flexible installation for enterprise servers, network devices, and other critical IT equipment. It includes a built-in charger with Fast Charge Technology, Smart Battery Management, hot-swappable user-replaceable batteries, and plug-and-play DC connectors for daisy-chaining additional EBMs. The BP48VL2U01 supports up to 10 EBMs and offers a 4-hour typical recharge time from 0% to 90%, helping maintain reliable backup power for critical systems.