Hi
The cells will be fine with it, i have ran 3.5, 4.5, 5.5 6.5 and 10.5 with varied results and even in 10th touring 3.5 the cells didnt get horrendously hot, hot to hold but not melting the case story.
I did however manage to use a nakered corrally and melted the tube out of the side of the trakpower case

so advise that all connectors are tight!