Walmart offers the CyberPower Standby 8-Outlet 425VA UPS Battery Backup for $27.50. Choose in-store pickup to dodge the $5.99 shipping fee. That's $5 under our March mention and the lowest price we've seen. (It's the best deal now by $11.) This UPS features surge protection, LED indicators, EMI/RFI filtering, and audible alarms.