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Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion

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Introdução

NOTE: You can now buy ML2032 batteries online, so you will no longer need to disable the solar panels.

Logitech support will not help you and they do not have ML2032 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 ML2032 form eBay nor Amazon is save.

So I decided to modify my keyboard. If you disable solar panels, there will not be any charging for the battery and then you can use regular CR2032 battery which is easy to buy and replace.

And since I did not find any guide like this I decided to share the steps with you.

O que você precisa

  1. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Turn off the keyboard: passo 1, imagem 1 %32

    • Before you begin, flip the keyboard's power switch into the OFF position.

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  2. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Flip the keyboard over: passo 2, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Flip the keyboard over: passo 2, imagem 2 %32

    • Flip the entire keyboard over, keys facing down.

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  3. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Pry open the battery tray: passo 3, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Pry open the battery tray: passo 3, imagem 2 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Pry open the battery tray: passo 3, imagem 3 %32

    • The ML2032 rechargeable coin cell battery is located in a tray at the back edge of the keyboard.

    • Insert the flat end of a spudger into the gap between the battery tray and the top surface of the keyboard.

    • Pivot the spudger down, towards the top of the keyboard, to begin to pry the tray out of its cavity.

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  4. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove the battery tray: passo 4, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove the battery tray: passo 4, imagem 2 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove the battery tray: passo 4, imagem 3 %32

    • Use the flat end of the spudger to push the battery tray out and away from the keyboard.

    • The tray is held in by small "ears" and may take a significant amount of force to dislodge.

    • Remove the battery tray.

    • During reassembly, firmly push the battery tray into its slot until it clicks into place.

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  6. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove the battery: passo 5, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove the battery: passo 5, imagem 2 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove the battery: passo 5, imagem 3 %32

    • Push the battery out of the tray to remove it.

    • Note the battery orientation—it can only go in one way. Set the battery into the tray with side with the text and the "+" sign facing down.

    • Use only a rechargeable ML2032 coin cell battery as a replacement. Although it's the same size and shape as the more common CR2032, CR2032s are not rechargeable.

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  7. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove old battery: passo 6, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove old battery: passo 6, imagem 2 %32
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    • You can just simply cover both solar panels with some thick black tape (like electrical tape) and then continue to the step 10. If you decide for this you need to make sure (this is really important!) that your Solar app is showing zero energy received from the solar panels (CL2032 can not be recharged)!

    • Or you decide for 100% working but more complicated solution which involves peeling off keyboards plastic top deck (it covers screws) and desoldering wires form the solar panels. Your keyboard cover might not stick back as good as it was. In this case continue to the next step.

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  9. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Peel off the plastic top deck: passo 8, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Peel off the plastic top deck: passo 8, imagem 2 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Peel off the plastic top deck: passo 8, imagem 3 %32

    • Be careful to not crack the plastic deck. Don't pull it off hard.

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  10. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Unscrew the screws: passo 9, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Unscrew the screws: passo 9, imagem 2 %32

    • Remove the seven black Phillips screws.

    • Remove the 22 silver screws.

    • Your model may only have 21 silver screws.

    • 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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  11. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove and flip the top cover: passo 10, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove and flip the top cover: passo 10, imagem 2 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Remove and flip the top cover: passo 10, imagem 3 %32

    • Unclip the back pannel from the front (keys) pannel.

    • When you flip the (keys) pannel you can notice that both solar panels have a pair of cables.

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  12. Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Desolder one wire from both solar panels: passo 11, imagem 1 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Desolder one wire from both solar panels: passo 11, imagem 2 %32 Logitech K750 Keyboard ML2032 to CR2032 Battery Conversion, Desolder one wire from both solar panels: passo 11, imagem 3 %32

    • 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.

    • Tape desoldered cables so they do not come in contact with anything.

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    • Insert fresh CL2032 battery in the battery compartment - check the polarity a close battery tray.

    • Note: your Solar app will be showing zero energy because there is not power coming from the solar panels to the logic board.

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Conclusão

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

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Autor(a)

com 6 outros contribuidores

Endrju

Membro desde: 09/11/15

599 Reputação

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Emblemas: 9

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44 comentários

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!

Don Barthel - Responder

Hey... Without turning the keyboard off, its working very well.. Solar App still showing that the capacitiy is High and status is Excelent :-)

Endrju - Responder

Battery still works like a charm without any notice of capacity drop (if Solar App provides correct readings)

Endrju -

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...)

Aquadrat - Responder

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 -

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