Sofirn SP36 not charging

Hi everyone,

The USB port in my Sofirn SP36 has suddenly stopped working
Well, not completely, in general it works, the switch light is fine… but it doesn’t charge the batteries (or if it does, it’s slower than a herd of snails traveling through peanut butter - not even 0,1V up after a 5h charging…)

What’s more, instead of turning red when charging (with the flashlight turned off), the switch turns green, but with lime-ish color, lighter than the finished charging indicator

When ramping up, the (connected to USB) flashlight comes to a point where it turns to red, and when ramping down it goes back to light green again

There’s nothing wrong with the cells, as my default 18650 charger works fine with them

Yes, didn’t help
It all happened at random, I don’t remember clicking options other than checking the battery
It was just that one day I connected the flashlight to USB and noticed all that stuff
Even the flashlight itself wasn’t used too often, let alone the USB port