Fry's offers the CyberPower 8-Outlet 450VA UPS Battery Backup for $31. Opt for in-store pickup to dodge the $4.75 shipping fee. That's $4 less than our July mention and the lowest price we could find by $13. It features 890 joules of surge protection, four outlets with battery backup, EMI/RFI noise filter, and a USB port.

Update: It's now available for in-store pickup only.