Originally Posted by rcphreak
the only way a c rating will cause an issue it if its too low . as that is how many amps the battery can safely put out . if higher than the requirement it hurts nothing but if too low it can in fact puff the batterys and ruin them or causing them to run hot and prematurely die faster or wirst case catch fire .
Also, using a higher C-rating often increases power & top speed. Higher-C packs with lower internal resistance will maintain their voltage under load much better than lower-C packs with higher internal resistance - which causes a greater voltage-drop under load.