Use Rakuten coupon code 5348B30
Buy.com has this CyberPower CP850AVRLCD UPS Backup Battery for $104.99 after instant savings. Shipping is free. Apply the coupon code and the price drops to $94.99. This same backup battery is sold at TigerDirect for $116.99
. It features an intelligent LCD diagnostic display, resettable circuit breaker and comes with a 3 year warranty.