[nativepaul]

Personally for me, Iam a basher not a racer so I can run a smaller lighter battery back in my cars and have a better performing and handling car at the expence of run time with higher "C" rated batteries, and for my boats I have a bunch of 240A controllers it would be nice to be able to pull 200A from the batteries although these will need a wire change to do so, also with a 450A burst rating I can run 2 motors and ESCs from 1 pack for a few seconds and hopefully get myself a record.

For car racers that need a 15 minute run time, the "actual C rating" doesnt matter, as a 15 minute run is only 4C average and even the first generation of LiPos would manage that, however there are 20C spikes that 4C batteries couldnt deal with and it wasnt till the 10C cells came out that LiPos were man enough for the task so you might say why not stick with 10C batteries and save a bunch of cash? The answer is that with every increase in "C" rating comes an increase in voltage under load which becomes even more apparent when used at less than its max "C" rating, a 10C pack would drop to about 2.8V under those spikes and only recover to about 3.2V between the spikes, wheras 45C cells will hold about 3.7v in the spikes and recover to full battery voltage in bewtween, a difference of 3.6v on a 4 cell pack which with a 100A peak is an extra 360Watts, or a whole 10th scale touring car more power than you had with 10C batteries. If 45c give a just couple of tenths of a volt under load more than 35C cells that is still 80Watts more power. As well as the power advantages the further under its rating you use a battery the cooler it will run and longer it will stay in good condition for, also I normally see an increase to my run time as well as extra power when I upgrade my cells for the same mAh rating which points to an increse in chemical efficiency.