Question How much mAh of a wireless powerbank does wireless charging waste over wired charging?

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Senior Member
Sep 22, 2010
I have a 10,000 mAh 22.5W magnetic powerbank and I noticed that the 10,000 mAh can only do a 1 full wireless charge of S23U which has a 5,000 mAh capacity. My powerbank at full charge was only able to charge my S23U from 10% until 96%. Considering that I've not used the phone extensively while being wirelessly charged and the 10,000 mAh is not true rated.

Is this really the case for wireless charging. The capacity consumed is doubled compared to Wired charging?


Senior Member
Jun 23, 2020
Samsung Galaxy Note 10+
The power lose can be high. Wireless charging isn't ideal for a number of reasons. Excess heat production being the core issue.

The bank uses a switching voltage converter for stepping it up and/or the wireless charger does I would think. That's another chunk out of the efficiency.