Reported by Nikolaus Schaller, Apr 10, 2020

It is quite a while that we did look at our GAB driver extensions to 
make it useable for the L3704.
Last time we did bigger tests the ADC voltage reading wasn't very 
reliable.
But independently of this, the reported State-of-Charge value was 
not consistent.
Anyways it is a good idea to take another look into it.