1 RBC 21 5.51 x 4.02 x 4.09 Recessed Terminal Battery. FITS- RBC 21, APC Back UPS Office 400C, APC BF400C, APC BF500, APC BF500BB, APC BF500V. Does not include wiring harness, save and re-use existing wiring harness.
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SPECIAL NOTE: The Back UPS OFFICE 500 Requires a
different battery then the BACK UPS 500 Batteries. If you have a Back-UPS
click here to purchase the correct battery.