Open the .deb into any package manager
You will need Theos
Then you can run these commands :
git clone https//github.com/FireBibi/BatteryTrolled
cd BatteryTrolled
make package FINALPACKAGE=1
if you need a rootless package, you can add THEOS_PACKAGE_SCHEME=rootless
at the end of the make command.
Have fun :)