Finding Battery Capacity for reMarkable Tablet

I like to get a feel for the battery conditions of my device. For the reMarkable, you can check after you ssh with:

awk -F'=' '/POWER_SUPPLY_CHARGE_FULL=/{current=$2} /POWER_SUPPLY_CHARGE_FULL_DESIGN=/{design=$2} END{printf "\nBattery Health: %.2f%%\n", (current/design)*100}' /sys/class/power_supply/max77818_battery/uevent

It’ll print something like:

Battery Health: 95.25%