Maximum battery voltage?
What is the maximum battery voltage for the expansion board version 2? From the technical specification for the battery charger chip bq24040, the max voltage is 28V, so I believe we can use either one cell (3.7V lipo), two cells (7.4), three cells (11.1V), four cells (14.8V), five cells (18.5V) or six cells (22.2V). Correct?
@bigboy20769 Besides (and while) charging, you have to run the xxPy from the battery, and the maximum input voltage is 5.5V. So the answer is: one cell.