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Use this guide to replace the battery in a Logitech MX Ergo.
If your battery is swollen, take appropriate precautions. For your safety, discharge your battery below 25% before disassembling your device. This reduces the risk of a dangerous thermal event if the battery is accidentally damaged during the repair.
You’ll need replacement adhesive to reattach components when reassembling the device.
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Before you begin, flip the mouse's power switch into the OFF position.
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Unplug all cables from your mouse.
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Remove the magnetic cover by pulling it away from the bottom of your mouse.
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Use a Torx T6 screwdriver to remove the six 5.7 mm-long screws securing the two halves of the mouse together.
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Insert a spudger into the hole on the bottom of the mouse, beneath the trackball.
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Use the spudger to push the trackball out of its recess.
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Remove the trackball.
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Insert the tip of an opening pick into the seam between the two halves, near the middle of the right edge.
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Twist the opening pick to release the plastic clip.
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Slide the opening pick along the seam until it's about half way to the rear of the mouse.
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Twist the pick to release the plastic clip.
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Slide the opening pick all the way to the rear the mouse.
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Twist the pick to release the plastic clip.
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Slide the opening pick to the middle of the left edge, next to the trackball recess.
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Twist the pick to release the plastic clip.
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Gently lift the top half and place it to the left of the mouse so you can access the internals.
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Use the point of a spudger to gently lift alternating sides of the black sliding lock on the interconnect cable socket.
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Use tweezers or your fingers to pull the interconnect cable straight up and out of its socket.
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Lift the top half of the mouse straight up and remove it.
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Use the pointed end of a spudger to push up and the battery connector, loosening it in its socket.
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Insert the long edge of an opening pick between the long edge of the battery and its housing, at the side opposite the battery cable.
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Use your opening pick to pry up the battery and separate its adhesive. Apply steady, constant force and slide the pick farther under the battery as necessary.
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Use your fingers to lift the battery out of its housing.
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Use your fingers to grip the battery cables and pull the connector straight up and out of its socket.
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Remove the battery.
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If the battery adhesive is still sticky, you can reuse it. Otherwise, remove all the old battery adhesive.
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If your new battery has adhesive pre-installed, remove the plastic liner to expose the adhesive. Otherwise, apply strips of thin, double-sided tape to the battery well (not directly to the battery) where the old adhesive was.
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Firmly press the battery into place, making sure the cables are on the side closest to their socket.
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To reassemble your device, follow the above steps 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? Check out our Answers community for troubleshooting help.
To reassemble your device, follow the above steps 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? Check out our Answers community for troubleshooting help.
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This guide is fantastic! It was super easy to fix! Thanks!
Thank you for this !! Visited this site before for other tutorials you guys are great. This was easy to follow worked good for me.
Its a very thorough explinations and guide except the most important point.
Where to buy the new replacement battery.
Those are very well-done instructions. The new battery installation went very well. Thanks for the help.
hi where did you buy the battery?
Yanna -
If you do a google search on Logitech 533-00121 battery you will find suppliers
An easier way to separate the two halves of the case: After removing the ball in Step 4 of the above Guide, (1) hold the case in your right hand, with the power switch forward and facing left, the concave ball recess facing up and to your right, and the edge of your right thumb firmly grasping the right edge of the rim around the ball recess (the rim is on the upper half of the case and protrudes a bit from the ball recess, so you can get a tight grip on it; the ball recess is on the lower half and is separate from the rim); (2) insert a sturdy rod into the hole that you used to remove the ball (e.g., the shaft of a Phillips-head screwdriver); (3) while holding the rim with your thumb as described in (1), gently but firmly twist the sturdy rod downward to pry the two halves of the case apart; (4) as described in Step 9 of the Guide, the two halves are connected by a cable, so as they separate be careful to keep them close to each other to prevent damage ; and (5) continue with Steps 9 through 16 of the Guide.
