Amazon.com: SPS Brand 12V 8Ah Replacement Battery for APC Back-UPS LS 500 BP500UC UPS Battery : Health & Household
APC Back-UPS Pro 500VA, Lithium Ion UPS - BG500 | APC USA
APC Back-UPS 500 - 6ft, AC 120V, 50/60Hz, 300 Watts, 500VA, 480 Joules, Hot-swappable, LED Status Display, 6x NEMA 5-15R, USB, Black - BK500BLK at TigerDirect.com