So I've seen batteries showing their capacity in mAh and I've seen others showing in Wh. Phone batteries are always measured in mAh, while for some reason BatteryInfoViewer on my computer only shows in Wh, but doesn't show any amp levels.
So here's two different batteries.
My phone's battery; 3.1 Ah x 3.85 volts = 11.9 Wh
My laptop's battery; 42 Wh / 17 volts = 2470 mAh
When you look at it in mAh, the phone's battery seems to have more capacity than the laptop, which made no sense before. But now with Wh, laptop's battery has 3.5 times more capacity than the phone. Why do we have two different measurements for capacity?
But I really don't get it… Why is it less in mAh but more in Wh? I get that it's because of voltage but that's not the question.
The question is… If I were to somehow use my laptop's 3100 mAh (42Wh) battery on my phone, would it last longer or shorter?
Best Answer
It might not be the question, but it is the answer.
Wh is a measure of the amount of energy stored in the battery. With an efficient voltage converter the battery with the higher energy would power your phone for longer.