American Power Conversion (APC) - RBC7 - Battery, Lead-Acid, 6.80 in. (Max.) H x 6 in. (Max.) W x 7.20 in. (Max.) D, 0 - Allied Electronics & Automation, part of RS Group
UBC7 Replacement Battery Kit Compatible with APC RBC7 US Only - BatteryUPSForLess
Amazon.com: APC RBC7 Smart-UPS SMT SMT1500 UPS 12V 18Ah Battery Real 18 Amp Gel Deep Cycle AGM/SLA Designed for UPS-12180- Nut & Bolt L1-2 Pack Beiter DC Power : Electronics