Amazon.com: APC RBC48 Replacement Battery Cartridge #48 - UPS battery - 1 x lead acid - for P/N: DLA750, DLA750I, SMT750, SMT750I, SMT750TW, SMT750US, SUA750, SUA : Electronics
APWRBC8 - APC by Schneider Electric Replacement Battery Cartridge - 7000 mAh - 12 V DC - Lead Acid - Hot Swappable - 3 Year Minimum Battery Life - 5 Year Maximum Battery Life - Office Supply Hut