Rechargeable Backup Batteries for the CentralAlert™ CA-360 System – Serene Group, Inc.
This tiny little backup battery packs enough punch to jump a car back to life | Boing Boing
DSC BD412 System Backup Battery (12 volt 4 amp)
Battery BACKUP for Home - DIY Step by Step - YouTube
Mighty Max Battery 12V 5Ah 4ah Alarm System Back Up Vista 20P ADT Rechargeable Sealed Lead Acid 1250 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
10-KW Whole House Solar Power Grid-tie with Lithium Battery Backup – pluggedsolar