MIGHTY MAX BATTERY 12V 3.4AH Compatible Battery for APC ES BE350G BE350T BE350U RBC35 ML3-12104 - The Home Depot
Amazon.com: APC SmartUPS SUA2200 12V 18Ah UPS Battery - This is an AJC Brand Replacement : Health & Household
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
RBC13 - APC 12V DC Lead Acid Hot-Swappable Replacement Batteries for Uxbp48 /Uxbp24 (UPS)