Introduction
It is almost impossible to buy new ML2032 battery to replace old one.
Logitech support will not help you and the do not have this as a spare part.
Maxell - battery manufacturer answered me this: "Unfortunately ML type batteries are industrial batteries which we sell to OEMs only. Due to strict health and safety purposes we are not allowed to sell this type of batteries to endusers."
The claim from Maxell is also the reason why I do not believe buying this form eBay nor Amazon.
So I decided to modify my keyboard. If you disable solar pannels, there will not be any charging for the battery and then you can use regular CR2032 battery which is easy to buy.
And since I did not find any guide like this I decided to share the steps with you.
Tools
Parts
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The battery tray is near the top edge of the bottom side of the keyboard. It is designed to be easy to insert, difficult to remove.
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Once you get the "ears" past the edge, just slide the tray the rest of the way out.
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Note the battery type carefully: It is a ML2032, which is rechargeable. It is NOT the same as a CR2032, which is not rechargeable. Putting a CR2032 in here is a recipe for bad things to happen.
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Note the proper orientation (see picture), positive + symbol facing towards bottom. Negative side facing keys. Slide the tray with the new battery back in. The battery can be oriented incorrectly and NOT work.
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If you want to make it easier to remove the battery the next time, you could trim the ears slightly. Or slice some notches in the plastic "springs" to weaken a little.
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Steps are described in this guide Logitech K750 Keyboard Battery Replacement. Turn off the keyboard before removing the battery.
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This battery can be dangerous so be carefull. For more details read Maxell Product Safety Data Sheet.
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For more information about ML type bateries read this Lithium Manganese Dioxide Rechargable Battery.
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Trash old ML2032 battery in special container!
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Be careful to not crack the plastic deck. Don't pull it off hard.
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Remove the seven black Phillips screws.
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Remove the 22 silver screws.
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Put the screws somewhere into the bowl to not lose them and try to remember the position of the black ones.
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Unclip the back pannel from the front (keys) pannel.
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When you flip the (keys) pannel you can notice that both solar panels have a pair of cables.
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I have decided to desolder the long cable (red and green one) because they are far away from the logic board so I will not transfer heat to it while desoldering them.
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Tape desoldered cables so they do not come in contact with anything.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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39 Comments
How long did the CR2032 battery last in use?
I'm thinking not very long so I'm considering attaching a CR123 (big 3V photo lithium battery) holder to the underside and wiring it in.
Thanks for the guide!
Less difficult: I just covered the solar panels with thick 3M black tape. No charging according to the solar app and keyboard working fine with CR2032 (until replacement ML2032 comes in from China...)
Hey, thats a pretty good tip - I'll use that when battery in my mum's K750 keyboard goes away.
I would just ensure that Solar App is showing zero in under a direct light of your desk lamp.
Endrju -
