I have noticed that there is a lot of confusion as what the C rate of a battery actually is. So I decided to do this quick post.

C rate is the discharge rate of the battery, or how much current it can supply.

How do I get the Amp supply from the C rate? For this example we'll use this battery.

If you have a 10C battery that means it can discharge 10 * the capacity. Remember that you usually measure current in amps and not milli-amps, so you convert the capacity (the battery we chose is 5200mah) so

so: the simple way to do this is

C rate is the discharge rate of the battery, or how much current it can supply.

How do I get the Amp supply from the C rate? For this example we'll use this battery.

If you have a 10C battery that means it can discharge 10 * the capacity. Remember that you usually measure current in amps and not milli-amps, so you convert the capacity (the battery we chose is 5200mah) so

**5200mAh = 5.2Ah, and 10*5.2 = 52**, so you can discharge 52 amps constant. if the battery has 20C burst then you can discharge 104 amps for ~10 seconds.**Amp output = C * Ah**(not mAh)so: the simple way to do this is

**A = C*(mAh/1000)**rating typically =

Higher CHeavierbattery (i.e. lower AWG (e.g. larger diameter) cables needed, heavier battery cells).

Lower Crating typically =Lighterbattery

So generally going to a high C battery (i.e. 70C) is not always the best choice if your Quad only draws a peak of, lets say, 10C for example. Also lower C rating lipos tend to cost less.

Reference Link(s) here.

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