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Follow this guide to replace a worn-out or dead battery in your Logitech MX Keys wireless keyboard.
It’s natural for batteries to lose capacity as they age. If your keyboard dies quickly and doesn't hold a charge, it may be time to replace the battery.
For safety, perform this repair when your battery is below 15% charge. Any charged lithium-ion battery can be hazardous if punctured or damaged. If your battery looks puffy or swollen, take appropriate precautions.
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Slide the keyboard's power switch into the OFF position.
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Unplug all cables from your keyboard.
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Lay your keyboard down with the feet facing up on a clean work surface.
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Heat an iOpener and lay it on the top left foot for one minute.
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Insert the point of a spudger under an end of the foot.
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Push the spudger underneath the foot and lift until you can grip it with your fingers.
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Peel the foot up and remove it.
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crwdns2935267:0crwdne2935267:0Tesa 61395 Tape$2.99
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Use a pair of angled tweezers to peel up and remove all the plastic film from the foot recesses.
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If you're installing new feet, remove them from their backing and firmly press them into place.
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If you're reusing the feet, use a strip of double-sided tape to secure them in their recesses.
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Use the pointed end of a spudger to poke through each film so you can access the screw underneath.
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Use a Phillips screwdriver to remove the three 7.6 mm‑long screws securing the battery cover.
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Insert an opening pick between the top edge of the battery cover and keyboard.
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Slide the clip along the top edge to release the clips.
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Insert an opening pick between the bottom edge of battery cover and keyboard.
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Slide the pick along the bottom edge to release the remaining clips.
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Remove the battery cover.
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Place the battery cover onto the keyboard assembly so the screw holes line up with their posts.
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Press down firmly along the battery cover to engage its clips.
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crwdns2935267:0crwdne2935267:0Tweezers$3.99
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Use a pair of angled tweezers to firmly grip the battery connector and slide it straight out of its socket.
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Insert the connector into its socket so the side with raised plastic in the center is facing up.
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Push on the edges of the connector with the flat end of a spudger until it's fully seated in the socket.
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Pull the three battery cables out of their channel in the keyboard.
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Insert the flat end of a spudger underneath the right edge of the battery, opposite the cables.
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Slide the spudger underneath the battery and gently lift to separate the adhesive securing it to the keyboard.
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Remove the battery.
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Remove any bits of the old adhesive from the battery recess.
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If your replacement battery doesn't come with tape pre-installed, apply double-sided tape to the battery recess (not directly to the battery).
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If your replacement battery has adhesive pre-installed, remove the plastic liner.
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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 the above steps in reverse order.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
Reuse or Recycle—Never put discarded electronic parts in household waste. Visit Logitech Recycling to find your nearest recycling points, including the option to mail back old devices to Logitech for free if there’s no convenient solution in your area. You can also take your e-waste to any R2 or e-Stewards certified recycler. And don’t let good working parts or repaired devices die a slow death in your sock drawer—pass them along to someone who can use them.
Share your experience—Leave a comment here or send your feedback directly to Logitech at repair@logitech.com to help shape future repair guides and product design.
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 the above steps in reverse order.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
Reuse or Recycle—Never put discarded electronic parts in household waste. Visit Logitech Recycling to find your nearest recycling points, including the option to mail back old devices to Logitech for free if there’s no convenient solution in your area. You can also take your e-waste to any R2 or e-Stewards certified recycler. And don’t let good working parts or repaired devices die a slow death in your sock drawer—pass them along to someone who can use them.
Share your experience—Leave a comment here or send your feedback directly to Logitech at repair@logitech.com to help shape future repair guides and product design.
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按照锂电池循环的寿命500次计算，mx key 充一次电至少可以用10天，那就是5000天，10几年后你才需要看这篇文章。
这只是理论。实际上，电池可持续使用 3 年。
I wish ifixit would sell the battery as well.
Though @timo is technically correct with his calculations, I use this keyboard so often that after only eight months, the battery needs to be recharged about once every two days. Time to replace it! Such calculations can never account for usability. I use the backlight feature constantly which I'm sure is why my battery degraded as quickly as it did.
Yes I agree with you. Ever since Logi PC SW failed to control the auto-backlit function, my MX Keys just lights up every second. The battery status went poor after using it like 11 months.
