The BP48VP2U02 is a rack/tower convertible Extended Battery Module (EBM) that extends battery runtimes during power outages and quickly restores full backup power with Fast Charge Technology BATTERY EQUALIZATION TECHNOLOGY: Advanced charging process that maintains the voltages of the batteries at the same level to increase battery life Compatible with the following CyberPower UPS systems: PR1000LCDRTXL2UA, PR1500LCDRTXL2U, PR1500RTXL2U, PR2000RTXL2U, PR2200LCDRTXL2U, PR2200RTXL2U, PR3000LCDRTXL2U, PR3000RTXL2U, OR1500LCDRTXL2U, and OR2200LCDRTXL2U HOT-SWAPPABLE BATTERIES: Can be replaced without powering down vital equipment; TOOLLESS BATTERY PANEL ACCESS: Makes battery replacement fast and simple 3-YEAR WARRANTY; UL SAFETY CERTIFIED: Product has been tested in a UL certified lab and listed with UL as meeting or exceeding safety standards