What Should I Do If My Alarm System Says SYSTEM LO BAT?
Troubleshoot Beeps, Chirps, Alerts, and More - EMC Security
Synergy Digital Alarm System Battery, Works with Honeywell L7000 LYNX TOUCH Alarm System, (Ni-MH, 7.2V, 1500 mAh) Ultra High Capacity, Compatible with Ademco 300-03864-1 Battery - Walmart.com
Replacing Your Alarm Control Battery | Inner Security Systems, Inc