http://rcdiy.ca/battery-capacity-remaining/
https://youtu.be/AeMpwOn516s
The battery capacity remaining script was taken by a user, improved, and sent back to me to share with the community. This is what open source is all about!
Besides battery capacity remaining based on mAh we now have the option to use the script with just a voltage sensor. We also have some cool and silly sound effects when you allow your battery to run down too low
Check out the blog post and video.
Stay Safe & Have Fun