The CyberPower BP72V60ART2U rack/tower convertible Extended Battery Module (EBM) for Smart App Online UPS systems OL2200RTXL2U, OL22000RTXL2UN, OL3000RTXL2U, OL3000RTXL2UN and OL3000RTXL2UHVN extends battery runtimes during power outages. This EBM takes 2U of rack space and can be installed as a tower to match the UPS form factor. It also has a built-in battery charger, providing Fast Charge Technology to quickly restore the backup power supply to full capacity. Up to ten EBMs can be added to the UPS, and the module's DC plug-and-play power connectors allow for daisy-chaining additional EBMs to a UPS system.The BP72V60ART2U typically has a UPS charging time of 4 hours (0-90%), regardless of whether one or ten EBMS are installed, and comes with a three-year warranty.