Allow me to complain about mAh as a measure of battery size 😫

I got my son a power bank, but given the “size” of that (20000 mAh) and his phone (3227 mAh) I still don’t know how many times it can charge his phone. You also need to know the rated voltage of each battery! (It was not the same.)

So how about the industry start using Wh instead? 🔋