APC UPS, 1000VA Sine Wave UPS Battery Backup & Surge Protector with AVR, 2 USB Charging Ports, LCD Uninterruptible Power Supply, Back-UPS Pro Series (BR1000MS) - Walmart.com
APC Smart-UPS XL 1000 (SUA1000XL) - Brand New Compatible Replacement Battery Kit with Harness - Walmart.com
APC Back-UPS Pro BX1000M UPS - External, Compact Tower, 600Watts, 1000VA, AVR, LCD, 120V, 8 Outlets, Energy Star Certified - BX1000M at TigerDirect.com
1) APC Back Pro 1000 UPS Battery Set | Sigma Batteries