Protection from short duration blackouts is available in four series of battery back up with valuable designs and features.
12V-2A Mini UPS Battery Backup for WiFi, Router, Modem Universal Interface
Multiple Output Battery Backup 8CH 13.8V120W UPS CCTV Camera Power Supply Distribution Box Ce FCC - China CCTV Power Box, Power Source
Furman F1500-UPS Uninterruptible Power Supply Battery Backup Power Conditioner
Eaton Commercial Battery Backup Power UPS
On-Line UPS System, 200–240V 5000VA 5000W, Hardwire In/Out, 3U
UPS (uninterruptible power supply)
EVERSECU 9 Channel 12V 5Amp DC Metal Boxed Cabinet Regulated UPS Power Supply Unit with Backup Battery Link for Burglar Alarms CCTV Cameras PTZ Access Control (Battery Not Included) : Electronics
UPS Solutions XRT6 Online UPS 6KVA with 10 Year Design Life Batteries
Power Conditioner & Battery Backup UPS For Agilent 7900 Series ICP-MS – Battery Backup Power, Inc.
UPS Slim 200 Watt Lithium Ion Battery Backup - AC Power Distribtion, Conditioning, and Control at JuiceGoose