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[–] 6 points 2 years ago (1 child)

Charge it from a smart power supply from battery at 1 to 100% then it can show you the number of mah/h it took to charge it.

I have this power supply which also has USB-C https://a.aliexpress.com/_mrChiQ6

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  • [–] 6 points 2 years ago

    Not sure how accurate this would be as charging is not 100% efficient. Also the amount of power the phone uses while charging would have to be taken into account as well.

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