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Amazon.com: APC UPS Battery Replacement, RBC2, for APC Back-UPS Models BE500R, BK300C, BK350, BK500, BK500BLK, BK500M, BK500MC, BK500MUS, and SC420, SU420NET black : Electronics
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MIGHTY MAX BATTERY 12V 9AH Compatible Battery for RBC2 APC Rechargeable PC9-12 - 8 Pack MAX3434115 - The Home Depot
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