Problem on my CGT

I have bamboo GT, a few month ago I' just bought a new CGT.. but i feel my CGT does not performed as i expected.. i've only manage to get 23km on AT wheels (my weight 77 kg) before the board totally shutdown.

The problem i've noticed that when i use fast charger on my CGT it will stop charging when the battery reach 39.00++ V.. and when i'll use normal charger its stop charging at 41.00++ V..

here is the picture of my cell.. (after using normal charger), i've noticed C7,C8 and C9 reach full charging too fast.. is it normal?
I did try to use my fast charger on my friend CGT, and it still charging when battery reach 41.00++V

 

Have you tried balance charging the board? Or do you unplug it as sson as the charger goes green?

 

how do i balance charging the board?is there any special tools to do that?sorry i'm a bit new on this..

 

No worries man.

To balance charge it, just leave it on the charger for 6-8 hours after the charger goes green. I usally just charge it overnight.

The BMS slowly makes sure that all the cells get charged to the same level.

 

now i get it.. ok will do that.. and update the outcome.. thanks man...god bless you..