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Logitech MX Master Battery Replacement

Introduction

Use this guide to replace the battery in your Logitech MX Master mouse.

Lithium-ion batteries have a limited lifespan. If your mouse dies quickly, it may be time to replace the battery.

If possible, follow this guide after your battery has fallen below 25% charge. While your MX Master has a relatively small battery, any charged battery is a potential safety hazard if accidentally bent or punctured.

What you need

  1. Logitech MX Master Battery Replacement, Soften the mouse feet adhesive: step 1, image 1 of 2 Logitech MX Master Battery Replacement, Soften the mouse feet adhesive: step 1, image 2 of 2

    • Flip the mouse's power switch into the OFF position, unplug any cables, and flip it over so the feet are facing up.

    • The unique shape of some mice can prevent them from laying flat. If you need to, lay your mouse on a soft towel to prevent wobble.

    • If you're planning to reuse your existing mouse feet, note that the adhesive needs to be thoroughly heated for them to be cleanly removed.

    • Apply a heated iOpener to the left and right mouse feet for about one minute each.

    • Alternatively, you can use a hair dryer to soften the mouse feet adhesive.

    • When using a hair dryer, don't heat the feet for more than a couple seconds at a time—anything hotter than just warm to the touch risks melting or warping the plastic lower case.

    • The information sticker adhesive may soften during this step, but you don't need to remove it.

    Edit

  2. Logitech MX Master Battery Replacement, Separate the left foot adhesive: step 2, image 1 of 3 Logitech MX Master Battery Replacement, Separate the left foot adhesive: step 2, image 2 of 3 Logitech MX Master Battery Replacement, Separate the left foot adhesive: step 2, image 3 of 3

    • Insert an opening pick between the left foot and the lower case.

    • Go slowly, and make sure the pick slides underneath both the foot and its adhesive pad. These layers separate easily.

    • If you plan on reusing your mouse feet, be careful not to crease them or separate them from their adhesive pads.

    • Slide your pick under the foot to separate its adhesive until you can grab it with your fingers.

    Edit

  3. Logitech MX Master Battery Replacement, Remove the left mouse foot: step 3, image 1 of 2 Logitech MX Master Battery Replacement, Remove the left mouse foot: step 3, image 2 of 2

    • Peel up and remove the left mouse foot.

    Edit

  4. Logitech MX Master Battery Replacement, Remove the right mouse foot: step 4, image 1 of 3 Logitech MX Master Battery Replacement, Remove the right mouse foot: step 4, image 2 of 3 Logitech MX Master Battery Replacement, Remove the right mouse foot: step 4, image 3 of 3

    • Insert and slide your opening pick under the right foot to separate its adhesive.

    • Remove the right mouse foot.

    Edit

  5. Logitech MX Master Battery Replacement, Reassembly information: step 5, image 1 of 3 Logitech MX Master Battery Replacement, Reassembly information: step 5, image 2 of 3 Logitech MX Master Battery Replacement, Reassembly information: step 5, image 3 of 3
    Tool used on this step:
    Tweezers
    $4.99
    Buy

    • For installing new mouse feet or reusing your old ones:

    • Use a pair of tweezers or a spudger to remove any large chunks of leftover adhesive.

    • Thoroughly clean the bottom of the mouse with isopropyl alcohol and a lint-free of microfiber cloth. Allow the surface to dry completely.

    • Peel your new mouse feet away from their adhesive liners and press them firmly into place.

    Edit

  6. Logitech MX Master Battery Replacement, Unfasten the lower case: step 6, image 1 of 1

    • Use a Phillips screwdriver to remove the four 6 mm‑long screws securing the lower half of the lower case.

    • Use a T5 Torx driver to remove the two 4.3 mm‑long screws securing the upper half of the lower case.

    Edit

  8. Logitech MX Master Battery Replacement, Release the gesture button clip: step 7, image 1 of 3 Logitech MX Master Battery Replacement, Release the gesture button clip: step 7, image 2 of 3 Logitech MX Master Battery Replacement, Release the gesture button clip: step 7, image 3 of 3

    • Insert your opening pick into the seam between the thumb rest and the lower case.

    • Pry your pick upwards and pull the upper shell away from the lower case with your free hand until you see the gesture button clip release.

    Edit

  9. Logitech MX Master Battery Replacement, Release the rear clips: step 8, image 1 of 3 Logitech MX Master Battery Replacement, Release the rear clips: step 8, image 2 of 3 Logitech MX Master Battery Replacement, Release the rear clips: step 8, image 3 of 3

    • Insert your opening pick between the rear of the upper shell and the lower case.

    • Slide your pick right, away from the thumb rest and pry upwards to release the two clips securing the rear of the upper shell.

    • Don't try to fully remove the top shell just yet—a cable connects the upper shell to the lower case.

    Edit

  10. Logitech MX Master Battery Replacement, Reposition the upper shell: step 9, image 1 of 3 Logitech MX Master Battery Replacement, Reposition the upper shell: step 9, image 2 of 3 Logitech MX Master Battery Replacement, Reposition the upper shell: step 9, image 3 of 3

    • Be careful not to strain the cable connecting the upper shell to the lower case.

    • Lift the upper shell away from the lower case and lay it on the thumb rest side.

    • To reinstall the upper shell, insert the gesture button clip first, then press down around the perimeter of the upper shell to engage the remaining clips.

    Edit

  11. Logitech MX Master Battery Replacement, Disconnect the upper shell: step 10, image 1 of 3 Logitech MX Master Battery Replacement, Disconnect the upper shell: step 10, image 2 of 3 Logitech MX Master Battery Replacement, Disconnect the upper shell: step 10, image 3 of 3

    • Use the point of a spudger to flip up the white locking flap on the interconnect cable's ZIF connector.

    • Pull the cable straight out of its socket.

    • During reassembly, insert the cable with its blue tab facing up, then flip down the locking flap. The black line will align with the socket's edge when the cable is fully inserted.

    Edit

  12. Logitech MX Master Battery Replacement, Remove the upper shell: step 11, image 1 of 1

    • Remove the upper shell from the lower case.

    Edit

  13. Logitech MX Master Battery Replacement, Unfasten the battery housing: step 12, image 1 of 1

    • For easy access to the battery connector, it's helpful to first move the battery and its housing out of the way.

    • Use your Phillips screwdriver to remove the three 6 mm-long screws securing the battery housing to the lower case.

    Edit

  14. Logitech MX Master Battery Replacement, Move the battery housing: step 13, image 1 of 2 Logitech MX Master Battery Replacement, Move the battery housing: step 13, image 2 of 2

    • Don't yank or strain the battery cable.

    • Lift the battery housing up and lay it over the rear edge of the lower case.

    Edit

  15. Logitech MX Master Battery Replacement, Disconnect the battery: step 14, image 1 of 3 Logitech MX Master Battery Replacement, Disconnect the battery: step 14, image 2 of 3 Logitech MX Master Battery Replacement, Disconnect the battery: step 14, image 3 of 3
    Tool used on this step:
    Tweezers
    $4.99
    Buy

    • Use a pair of tweezers or your fingers to grip the top of the battery connector.

    • Always pull cables by their connectors and not the wires themselves.

    • Gently rock the connector side to side and pull it out of its socket.

    • The connector is held tightly within its socket. If it feels stuck, try a different grip—use the protrusions around the neck of the connector if you need more leverage.

    Edit

  16. Logitech MX Master Battery Replacement, Soften the battery adhesive: step 15, image 1 of 2 Logitech MX Master Battery Replacement, Soften the battery adhesive: step 15, image 2 of 2

    • The battery is secured within its housing by some light adhesive.

    • Flip the battery housing over so the battery is facing down.

    • Apply a heated iOpener to the battery housing for about 2 minutes to soften the battery adhesive.

    Edit

  17. Logitech MX Master Battery Replacement, Separate the battery adhesive: step 16, image 1 of 3 Logitech MX Master Battery Replacement, Separate the battery adhesive: step 16, image 2 of 3 Logitech MX Master Battery Replacement, Separate the battery adhesive: step 16, image 3 of 3

    • Try not to bend, crease, deform, poke, or puncture the battery with your tool—a damaged battery is a potential fire hazard.

    • Insert your opening pick between the long edge of the battery and its housing, opposite the cable.

    • Slide your pick under the battery to slice the adhesive.

    • Pull up to peel the battery away from the adhesive.

    Edit

  18. Logitech MX Master Battery Replacement, Remove the battery: step 17, image 1 of 3 Logitech MX Master Battery Replacement, Remove the battery: step 17, image 2 of 3 Logitech MX Master Battery Replacement, Remove the battery: step 17, image 3 of 3
    Tool used on this step:
    Tesa 61395 Tape
    $5.99
    Buy

    • Remove the battery.

    • To install a new battery:

    • Use a spudger or your fingers to peel any old adhesive off of the battery housing. The old adhesive shouldn't leave any residue.

    • If your new battery doesn't come with preinstalled adhesive, place a couple strips of double-sided tape into the battery housing.

    • Orient your new battery so its cables route through the cutout in the corner of the housing. Press the battery firmly into place to secure it.

    Edit
Conclusion

Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before you install it.

To reassemble your device, follow these instructions in reverse order.

For optimal performance, calibrate your newly installed battery after completing this guide.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

15 other people completed this guide.

Author

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Clay Eickemeyer

Member since: 09/19/22

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5 Comments

Thank you so much for this guide! My MX Master’s battery life has been slowly dwindling. I made the mistake of not verifying my original battery’s dimensions, roughly 1” x 1.25”, about a third of the size of the replacement I ordered. Was still able to swap batteries (from 500mah to 1150mah) by swapping connectors and removing the battery holder compartment. The new battery’s size is sufficient to avoid movement, but used a drop of adhesive just in case.

DefaultHuman - Reply

Does anyone know where to find the correct size replacement battery? Thanks

Josh Hixson - Reply

I used a larger Lipo battery of the same voltage, and soldered the cables from the original... upgrade!

Glyn Griffiths - Reply

The battery in my MX Master P/N 810-004457 is larger than the one in this guide and provided in the kit. The connector is also different otherwise it wouldn't be a big deal. Looks like I will be soldering the new smaller battery in...

DisplayName - Reply

Please where did you get the smaller battery from? I also have a MX Master P/N 810-004457

Oluwaseun Akapo -

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