C Rating on Packs

so on sat a couple of guys were asking what the heck the C Rating on a lipo pack means. ie 20c 30c 35c etc.

Well c stand for its capacity to supply amperage. so 20 c means 20 times the batteries capacity. so if the pack is a 2200ma(2.2a) pack and its C rating is 20c this means it can constantly supply 44amps(2.2 x 20) to the speed controller without burning up and turning your aircraft into a fireball.

Now what will be the difference if you buy a 30c 2200ma pack? well essentially this
it can supply the power in larger amounts. Ie it can safely supply a constant amperage of 66amp(30 x 2.2a)

how does this affect your flying? not much unless you you are flying high powered EDF(Electric Ducted Fan) Or 3D helis which need large amounts of power in a light weight setup.

A 450 sized heli needs a 40a ESC or so. So using a 30c pack which can supply 66amp is pointless. as the speed control can only handle 40amp
In the long run you might notice that the 30c pack will last longer as its not using its full capacity all the time. but the price difference does not justify getting the large C rated packs in my opinion.

20C rating should be fine for most applications. if you need more amerage. go to a larger sized pack.