CyberPower Battery Backup Systems (Refurb) from $50 at Computers.woot! Ends 9/7 at 10PM PT. Computers.woot! is selling refurbished CyberPower battery backup systems from $50 with the discount shown on the product page. Shipping is $6; free for Amazon Prime members. The pictured refurbished CyberPower SX650U-R Battery Backup on sale for $50. Posted by DrBatman08/28/2024 at 11:04 PM PT