Hi,
I have a design that requires a 12V power supply, I have been using efest 26650 cells (IMR) in series (3x 26650s at 5000mah to make a 5aH 12v supply) but they do not have over discharge protection, any ideas how I can add this to the design? I have arduino’s available (quite a few, uno’s and also some of the digispark attiny85 ones). eventually I want to have something similar to the sparkfun lipo fuel guage, connected to a arduino with an oled to provide % or hours/ minutes left, but not even sure how that would work with 3 different cells in series. any ideas/ input?