The version 6 is a great charger and yeah...... the only problem I have is the back light going on and off at its own will .....but it does its job very well.
You'll notice that the cells do get quite warm if you use the boosting function to charge the cells from zero. I only use it just before a run......'cos sometimes I charge my cells a nite before track days and repeak them at the track. This boosting function will discharge the cells for 'bout 20 - 30 sec and revert back to charging. The short discharging cycle sort of "warmup" and reactivate the cells getting it ready for running....
The discharging function.....well......its just an opinion......I find my GFX gives me a more consistent reading than the CDC.
Hope these infor helps.