Why are larger (house, car) rechargeable batteries specified in (k)Wh but smaller batteries (laptop, smartphone) are specified in (m)Ah?

514 views

I get that, for a house/solar battery, it sort of makes sense as your typical energy usage would be measured in kWh on your bills. For the smaller devices, though, the chargers are usually rated in watts (especially if it’s USB-C), so why are the batteries specified in amp hours by the manufacturers?

In: 7

51 Answers

Anonymous 0 Comments

Force of habit, and it’s a bad habit.

Using Ah was a habit formed when everyone has the same voltage, which is no longer the case now. Using Ah at this point could and has caused confusions.

You are viewing 1 out of 51 answers, click here to view all answers.