lipo low cell

it is a zippy 3s 20-30c 5000mah.

I am thinking it has a bad cell. I checked it after i ran it yesterday and one cell was down but returning by the time i got it checked. it was .3 away from the othersbut heading back up. so I am thinking it is a weak cell.

link, this was in my backslash converiosn. it is a slash running 1/8 truggy wheels and tires. on a mamba max and vxl motor.

geared. 22-76