Mini UPS Battery Backup 10000mAH Uninterruptible Power Supply for WiFi, Router, Modem, Security Camera with Input DC/USB Output USB 5V DC 5V/9V/12V 2A (5V-12V DC) - Walmart.com
Modem 18650 three cell Battery Pack recommended by Jehu Garcia (@jehu) • Kit
200 count of mixed 18650 cells in 100 assorted modem battery packs ($0 – Battery Clearing House
Arris - Backup Battery - 10HR, for VOIP Modem - Batteries
Cable Modem SMPCM9 Battery for Dvw32xx Series for sale online | eBay
General FAQs: SBV3202: Battery Installation and Replacement
200 count of mixed 18650 cells in 100 assorted modem battery packs ($0 – Battery Clearing House
ARRIS Replacement Modem Battery Model BPB044S for sale online | eBay
Pace 5268AC Gateway 8 Hour Battery modem router Voice over Internet Protocol VoIP emergency backup power - Walmart.com
Synergy Digital Cable Modem Battery, Works with ARRIS SVG2482AC Cable Modem, (Li-Ion, 7.4V, 6800 mAh) Ultra High Capacity, Compatible with ARRIS BPB044S Battery - Walmart.com