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    Beautifully simple solution - I have a pair of power-banks that I love but are aging out. Yesterday I became curious as to whether they always wobbled a little on a flat surface or not, and I’ve started looking for a source for replacement batteries in case mine had started bulging.

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      I love the usefulness of 3D printing for old unsupported stuff. When the MFG stops making a part, just create a compatible (or improved) design and print!

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        That’s a really nice job. I didn’t realize the charge techniques were similar between li-ion and lipo but it makes sense.