Can anyone recommend a good replacement battery for GBA SP?

I see a few aftermarket solutions online. Does anyone have any particular experience or recommendations on one that works best? I imagine OEM batteries are pretty much gone for good, so I’m stuck with a 3rd party solution.

deja vu…

the battery I bought and mention in this older thread is still going strong!

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But perhaps more relevant recent knowledge, you can build your own battery

Gah… I’m losing my mind lol. Sorry for the duplicate thread.