Apc - Schneider SURT48XLBP, High Rate Discharge Design, Low Self-discharge, High Vibration Resistance, Hot Swap Batterie, User-replaceable batteries, Lead acid, Voltage 48 volt, Black, Batteries (UPS battery replacements). Our brand new replacement battery set for the APC SURT48XLBP Uninterruptible Power Supply (UPS) unit includes 8 SigmasTek SP12-7.5HR batteries (12 Volts 7.5 AH).