Logitech MX Master 4 Battery Replacement

ID: 193900

Description: Follow this guide to replace a worn-out or dead...

Steps:

1. Flip the mouse's power switch down into the OFF position and unplug any cables.
2. The mouse's unique shape prevents it from laying flat. If you need to, lay it down on a soft towel to prevent wobble.

3. Use a Phillips screwdriver to remove the six screws securing the two halves of the mouse together:
4. Five 4.3 mm‑long screws
5. One 6.3 mm‑long recessed screw

6. Two strong, plastic clips still secure the front of the mouse.
7. Insert the flat end of a spudger in the seam between the two halves of the mouse, near the power switch.
8. Slide the spudger along the seam to the very front of the mouse.
9. Gently pry the bottom half of the mouse away from the top half, until you feel and hear the first clip release.
10. You should only have to pry a small amount. If the mouse doesn't unclip, remove the spudger and start over.

11. Don't try to fully separate the two halves yet—a ribbon cable still connects them.
12. Grip the top half of the mouse in one hand, and the bottom half in your other hand.
13. Slowly pull the back of the mouse apart until you feel the last clip on the front release.
14. During reassembly, firmly pinch the mouse together near the front to engage the two clips.

15. Flip the top half of the mouse over the right side and use a sturdy object to prop it up, so you can access the battery.

16. Use a Phillips screwdriver to remove the three 4.4 mm‑long screws securing the battery.

17. Use your fingers to lift the battery straight up and remove it.
18. During reassembly, press the battery into place until the connector on the bottom edge clicks into its socket.