APC Back-UPS Pro 1500VA 10-Outlet/2-USB Battery Back-Up and Surge Protector Black BN1500M2 - Best Buy
Mighty Max Battery 12V 7AH for APC Back-UPS 550 BE550G Rechargeable Sealed Lead Acid 1270 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
Amazon.com: APC Back-UPS ES 550VA Replacement Battery : Health & Household
MIGHTY MAX BATTERY 12V 8Ah UPS Battery Replacement for APC Back-UPS ES BE550G MAX3422902 - The Home Depot
APC Power-Saving Back-UPS Pro 550, 550VA, LCD - APC Finland