Logitech M505 User Manual page 19

6. Replace the battery hatch and apply downward pressure to the LASER logo to lock it into place.
You should hear a "click" when the hatch is locked into place. This will protect the internal
components of the mouse and make the mouse more ergonomic during use.
CAUTION:
If the hatch does not lock into place easily, it may have been replaced
incorrectly. Do not force the battery hatch, or you may damage it!
Instead, remove the battery hatch from the mouse and try Step 6 again.
You have now stored your mouse's transceiver. Your mouse's USB transceiver should be
protected until you use the mouse again.
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