How Do You Open a Logitech Mouse Battery Compartment?
Flip your mouse over and slide the Power switch into the Off position.
Depending on the model mouse you’re using, this could be located anywhere on the bottom.

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Find the battery dooryou’ll see a seam that runs across and around a portion of the mouse.
With gentle pressure, push the battery compartment door down and in the direction of the arrow.
It should slide out revealing the batteries.
It should automatically reconnect to your setup.
Turn your mouse over and slide the Power switch to the Off position.
Then locate the battery door lock release.
Use gentle pressure to remove it.
Then slide the battery compartment cover back onto the mouse and turn the Power back On.
Your mouse should automatically reconnect with your machine.
How Do I Change the Battery in My Logitech Wireless Mouse?
Insert two fresh AA batteries, taking care to place the positive and negative ends in the right direction.
Replace the cover, and you’re good to go.
Press and hold the mouse power button until the light turns off.
Remove the battery cover on the bottom of the mouse by sliding the release latch.
Remove the old batteries, then insert two fresh AA batteries according to the battery compartment diagram.
Replace the cover and turn the mouse back on.
If it’s on the bottom, press the clip to remove the battery access cover.
If it’s on the body, press the release tab and flip the cover open.
Take out the old batteries, then insert new batteries, paying attention to the polarity diagram.
end the battery cover, then look for the optical beam’s red light.
PressLocateorSyncon the mouse transceiver to reconnect the mouse to your setup.