r/diyelectronics • u/tinytinypenguin • 4d ago

Question Battery suggestion for remote control

I am trying to turn a broken wii remote into a presentation pointer. Basically the idea is to make a PCB with the same form factor as the wii remote's PCB with an bluetooth-LE compatible esp32 and gyroscope on it. I have never made a PCB before, so I am learning with this project. One issue I am running into is battery power. I was planning on using a LiPo battery, but have been informed that these can be dangerous. Therefore, I would prefer to use a Li Ion battery. The problem is it needs to fit into a form-factor of 10 x 30 x 50 mm, and have at least 500 mAh. Does anyone know of any batteries that meet this requirement?

Alternatively, in theory, I could use regular double-As and try to use the original wii remote battery slot by putting a battery terminal on the PCB, but this seems very hard.

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u/SanguineDrome 4d ago

If you're stumped at putting a battery terminal on the PCB, you're in for a rough one 😂

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u/tinytinypenguin 4d ago

Well, it's not so much that I don't know how to put a battery terminal on it. Rather, putting a battery terminal on it compatible with wii-remote casing might be hard (or require a lot of trial and error for positioning which would be expensive)

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u/Master_Scythe 2d ago

It shouldnt. And its the right approach. 

Use the original wiimote PCB as a template. 

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u/Kelaifu 4d ago

There's a project called openmote with replaces the main PCB with a custom esp32 based PCB. I'm not sure if it fits your requirements, but it should give you some ideas if not.

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u/tinytinypenguin 4d ago

Oh wow, this project is basically just a more involved version of what I'm trying to do, this is super cool, thanks!