The CyberPower BP48VL2U02 rack/tower convertible Extended Battery Module (EBM) extends battery runtimes during power outages and is designed for CyberPower Ups systems OL3KRM. The BP48VL2U02 takes 2U of rack space and can be installed in a rack or tower configuration to match the Ups form factor. Toolless front panel removal makes battery replacement easier.Extended Battery Module (EBM)Extends runtime by adding up to 10 EBMs.Fast Charge TechnologyAllows Ups batteries to return to full capacity more rapidly by utilizing a built-in charger. Restores charge from 0-90% within four hours regardless of the number of EBMs.Smart Battery ManagementImproves and extends the functional life of a Ups battery and reduces excessive heat during work cycles by using a three-cycle charging process.