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My Inew v3 all of a sudden won't charge when on ( only charges when off)
gets hot and discharges the battery supper fast, I have bought 3 sets of batteries and even changed the charging port, still no luck. . Also it won't get recognized when plugged to my PC/Laptop. . . Any help here? Please.

Did anything happen to it? Did it get wet or suffer a bad fall? Sounds like somehing is getting shorted out. Try blowing on any contacts you can see. Not much else I can think of now, sorry. But will come back here if I do.

Agree with above. Look for any contaminants within the unit which might be shorting the power path.

Have you tried installing apps like Greenify or done a hard reset? There's a slim chance that some of your software is just hella pulling a ton of power.