Well to help if I can you want the best for your buck.
Now for run time you want high 2.20's in voltages.
Ir some where are 1.6 or 1.5 that is where your punch is the internal resistance
Next is your runtime for each cell somewhere in the 480 seconds per cell
I hope that helps
Hey Norman I am very sadden to see you sell the jammin
Team Losi 8ight
When in doubt blame your roll center
"Damm radio it is glitching again"