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はじめに

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.

  1. Locate the battery tray near the top edge of the bottom side of the keyboard.  It is designed to be easy to insert but difficult to remove.
    • Locate the battery tray near the top edge of the bottom side of the keyboard. It is designed to be easy to insert but difficult to remove.

  2. Use a putty knife or metal spudger to pry the tray out.  Insert it into the gap along the bottom, then angle the handle to direct the force of the tip away from the body of the keyboard.  Tap as needed.
    • Use a putty knife or metal spudger to pry the tray out. Insert it into the gap along the bottom, then angle the handle to direct the force of the tip away from the body of the keyboard. Tap as needed.

  3. Once the "ears" past the edge, it should be easy to slide the tray the rest of the way out.
    • Once the "ears" past the edge, it should be easy to slide the tray the rest of the way out.

    • Note the battery type carefully: It is a ML2032, which is rechargeable. This is NOT the same as a CR2032, which is not rechargeable. Do Not replace with CR2032, as the solar panels will attempt to charge it.

    • Note the proper orientation of the battery (see picture), positive + symbol facing towards bottom. Negative side facing keys.

    • To make it easier to remove the battery in the future, trim the ears slightly or slice some notches in the plastic "springs" to weaken them a little.

  4. Steps are described in this guide Logitech K750 Keyboard Battery Replacement. Turn off the keyboard before removing the battery. ML2032 battery can be dangerous so be carefull. For more details read Maxell Safety Data Sheet and Maxell Safety Instructios.
    • 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.

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

  6. Remove the seven black Phillips screws. Remove the 22 silver screws.
    • 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.

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

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

    • 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.

終わりに

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

19 の人々がこのガイドを完成させました。

Endrju

メンバー登録日: 2015年09月11日

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44 件のコメント

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 - 返信

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

Endrju - 返信

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 - 返信

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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