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Quickpost: iPad Pro Charging – Power Consumption

published on 2022-07-31 09:01:32 UTC by Didier Stevens
Content:

I charged an iPad Pro (12.9 Inch) and measured the power consumption (at 120V and 230V). According to the specs, this iPad has a battery with a capacity of 40.88 Wh.

Procedure: when the iPad Pro turns itself of because of a low battery, I started to charge the iPad with an Apple A2347 USB C charger and measured the AC power consumption of this charger. It consumes around 21 Watt, this value starts to diminish when the battery approaches full charge. When at 100%, the charger will still deliver power, slowly decreasing to 3 Watts, and then it stops delivering power for charging. At that point, I stop the power consumption measurement.

I did not use the iPad while charging.

This measurement was done twice: at 120V 60Hz and 230V 50Hz (using an AC power supply).

ACWhDuration
120V 60Hz57.17103:07:48
230V 50Hz57.55903:09:16

There’s not much difference between the two measurements, but what I’ll certainly take away from this test, is that it takes around 57 Wh of AC power to charge a 40.88 Wh battery!

Update: when I did these tests, my iPad Pro had around 84 charging cycles.


Quickpost info
Article: Quickpost: iPad Pro Charging – Power Consumption - published over 2 years ago.

https://blog.didierstevens.com/2022/07/31/quickpost-ipad-pro-charging-power-consumption/   
Published: 2022 07 31 09:01:32
Received: 2022 08 28 11:07:49
Feed: Didier Stevens
Source: Didier Stevens
Category: Cyber Security
Topic: Cyber Security
Views: 2

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