Honeywell Lyric User Reference Manual page 54

Battery Replacement (continued)
5. Unplug the battery and remove it as seen below.
6. Install the replacement battery; remember to replace the connector inside the battery
compartment.
7. Depending on your choice of a standard- or high-capacity replacement battery,
position the battery retainer clip as seen below.
8. Close the case and replace the screw shown in Step 4.
9. Return the Controller to its mounting location.
10. Press OK on the battery installation procedure screen.
11. The system confirms "Battery successfully installed".
12. Press OK. The system returns to the Advanced menu.
13. Press  to return to the previous screen(s).
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