Walmart offers the CyberPower Standby 8-Outlet 425VA UPS Battery Backup for $27.78. Opt for in-store pickup to avoid the $5.99 shipping charge. That's tied with our May mention as the lowest price we've seen. (It's also the best deal we could find now by $11.) This UPS features surge protection, LED indicators, EMI/RFI filtering, and audible alarms.