This low cost charger came with cooling fan that sounds terrible. I switched it to the following fan which improved a lot but still makes a bit of pitch sound:
[ Ссылка ]
To place the charger cover back, I had to cut off the internal slots of the balance leads. I placed extension cables in the slots for easier connection.
P.S.
Don't forget to calibrate the voltage channels
![](https://i.ytimg.com/vi/fBFvlyNV-zg/maxresdefault.jpg)