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Biggest cell capacity for 22 x 22 mm case


Appreciate some advises and insight to find a rechargable cell fitting 22 x 22 mm case.  Would like to find a cell that is higher for bigger capacity, 100 to 300 mAh, with protection chip on cell

Which chemistry is best. Li Ion, Li Polymer or LiFePo4?  TIA

Do you live in Flatland?  :)  (https://en.wikipedia.org/wiki/Flatland)

Do you want a cell or a battery?  You have asked about both but they are different things.

Many thanks.  Edited


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