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
APC Back-UPS Pro 1500VA 10-Outlet/2-USB Battery Back-Up and Surge Protector Black BN1500M2 - Best Buy
MIGHTY MAX BATTERY 12V 8Ah UPS Battery Replacement for APC Back-UPS ES BE550G MAX3422902 - The Home Depot
Battery kit for APC Back UPS 550/650/700 replaces APCRBC110
APC Back-UPS ES 550 - UPS - 330 Watt - 550 VA - BE550G - UPS Battery Backups - CDW.com
APC Battery Back-UPS Pro BX1000M BX1000M B&H Photo Video
BR550GI APC Power-Saving Back-UPS Pro 550 - Worldeyecam