Logitech MX Master Mouse Battery Replacement

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Introduction

After years of use, you might have noticed that your Logitech MX Master does not hold a charge anymore, requiring you to keep it constantly plugged in. This is frustrating as it defeats the purpose of a wireless mouse.

This guide will teach you how to safely disassemble your mouse and replace your aging rechargeable battery. After you complete this guide, you will breathe new life into your MX Master and regain the freedom of wireless peripherals.

What you need

1. Step 1 Battery
  When dealing with any electronic device, it is important to first make sure the power has been turned off.
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2. Step 2
  Tool used on this step:
  Tweezers
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  Remove the two slide pads using a pair of tweezers to reveal the screws underneath.
  
  Remove the two screws from the top of the mouse using a Torx T5 screwdriver.
  
  Remove the four screws under the slide pads using a Phillips #00 screwdriver.
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3. Step 3
  To separate the two halves, grip the top of the mouse, and twist to the right and slightly forward.
  
  Potential for device damage: Take caution of the connecting tabs in the back and the ribbon cable on the thumb button.
  
  Holding both halves, flip up the ribbon cable connector with a spudger to free both halves.
  
  You can optionally skip detaching the cable due to its difficulty in reattachment. However, this can put stress on the cable and connector and risk damaging the device.
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5. Step 4
  Use a plastic opening tool or tweezers to disconnect the battery connector.
  
  Use an opening tool to pry the battery out of the mouse.
  
  Potential for device damage: Use a firm, non-metal tool to eliminate risk of damage to the battery.
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6. Step 5
  Connect the new battery, making sure the pins line up properly.
  
  After connected, firmly press the new battery into the slot.
  
  The remaining adhesive will be enough to ensure a solid adhesion.
  
  Tuck the wires back into their notch.
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7. Step 6
  After the new battery has been installed, check to make sure everything works by turning on the device. You should see one of the 1, 2, or 3 lights blink.
  
  If it does not power on, double check the battery connection.
  
  If the device successfully powers on, turn it back off in preparation for reassembly.
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8. Step 7
  Reattaching the ribbon cable is possibly the hardest step of the whole process.
  
  While holding both halves in your hand, line up and insert the ribbon cable into its connector.
  
  It will try to keep popping out; using the tweezers to line it up is helpful.
  
  With the cable inserted, flip down the connector cap, locking the cable in place.
  
  You can gently tug the cable to make sure the connection is strong.
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9. Step 8
  To rejoin the halves, hold the top half and line up the thumb button into its notch.
  
  Press the right side down in a slightly rotating motion until you hear a firm click.
  
  Reinsert the two screws in the top of the mouse using a Torx T5 screwdriver.
  
  Reinsert the four screws in the rest of the mouse using a Phillips #00 screwdriver.
  
  Tighten the top screw under the big pad just enough so the top of the head is flush to the surface. Screwing it in too much can affect the functionality of the thumb button.
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10. Step 9
  Place the new slide pads in their proper orientation.
  
  Be sure to remove the film on the pads; they will not slide smoothly with it on.
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Conclusion

After completion of the battery replacement, you can now get back to enjoying lengthy time in between charges, bringing true wireless back to your wireless mouse.

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