How to find out the amount of mAh in the battery through the console, preferably without utilities?

Question

linux

Hello. I think the essence of the question is clear from the title, just explain.
I want to have xxxx / xxxx mAh output.
That is, how many mAh are now and how many mAh are the capacity.
Searching the directories, I found /sys/class/power_supply/battery/, but did not find the capacity.

Answer 1

cat /sys/class/power_supply/BAT0/charge_now
cat /sys/class/power_supply/BAT0/charge_full