Battery kit for APC Smart UPS 750 replaces APC RBC48
American Power Conversion (APC) - RBC2 - Battery, Lead-Acid, 1.90 in. (Max.) H x 4.00 in. (Max.) W x 5.50 in. (Max.) D - Allied Electronics & Automation
APC BACK-UPS Series UPS Replacement Batteries - Lex Tec
Battery kit for APC Smart UPS 750 replaces APC RBC48