works. bigger then I thought. soldered by default for 1s battery
Measured and as describe, transition at 3.90, 3.70, 3.50 and 3.30 volts. Problem is that it is not really suitable for LiPo or LiIon where globally only 2 the LED are useful to see remaining capacity, showing 80% and 20% level. The other 2 LEDs are too low to be useful to check remaining capacity with no load. Maybe under load it can work better. For the price it remain a flexible indicator.