APC RBC57 Replacement Battery by APC Save 12% Original price $629.00 Current price $553.00 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart APC RBC57 Replacement Battery Use with - APC SMART-UPS RT 1500VA Rack Tower 120VA (Model #:SURTA150015MXL2U ) Notes: Replace battery and plug APC unit into wall and charge overnight before plugging in any devices to the APC unit.