Lynx Plus - Replace Backup Battery
This process will require you to have a Honeywell LYNXRCHKIT-SC 7.2 Volt 1100 mA battery. This battery can often be purchased at your local hardware, mass retailer, or battery store.
1. Press both top tabs with a screwdriver, then pull the front face-plate down.
2. Remove the battery holder screw, then unplug the battery from its circuit board to remove it.
3. Remove and replace the 7.2 Volt 1100 mA LYNXRCHKIT-SC battery.