Thats cool so hopefully it’s working ok? Does that mean you have a problem with your 2s batteries?
Quite possibly. Ones dead obv. Will just leave the other on the radio master and hopefully the 4s be fine. My RC car 2s hard shell had issues too. Weird
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Just keep a good eye on them when charging until you’re sure it’s all good 
Well caved in last week and got a ISDT Q8 and nicked a PSU from a dead PC at work…
It managed to pull that massively out of range cell to 3.8 and store them all at 3.8!
Think me T200 for the bin or just LiMh
Might just be something easy like a loose wire inside. Have a look
Yeah it’s weird. It detects the cell voltages (have 2 chargers and 2 testers that report the cell voltage within a .1 of each other), just doesn’t seem to charge em. Weird as when I pit to store you see 3 cells go to 3.7ish and one goes UP to 4.2!
Will open her up tomorrow when get back from crashing me brand new quad
Almost like two of the balance wires inside are crossed!