Bought 2 of these batteries and thought that 12C may be a bit low for my planes. However I have found that they get to the same temp (approx 35 degrees C) as my Flightpower 20C Evo suggesting that they may be more than 12C capable. I use them in an Extremeflight Extra which draws about 20 Amps. These batteries are lighter that the 20C versions as well so keeps the weight down also.