[DrKnow65]

yes and no... higher C ratings tend to translate to lower internal resistance, but there are some 25c cells that hold their voltage better than 30c cells. No matter what you won't find a lipo cells that will stay at 4.2v even at 5c.

if weight is the issue, you can get a lower capacity with a higher C rating that should supply the amps you are looking for.

try to get a lipo that is 120% of the rating you need.