"C" Rating means...

[Crazy Professor]

Hi Crew,

Just had a thought...

Vehicle Batteries are rated according to their "CCA", take a look on the top of your vehicle battery next time you are under the bonnet. "CCA" Stands for "Cold Cranking Amps". This is the amount of amps the battery is able to supply the starter motor when you turn the key. Bigger vehicles need a higher "CCA" rated battery to turn the engine over; a higher amount of amps available.

Could it be that the "C" rating on our Li-Po's is somewhat related to the "CCA" on vehicle batteries. My guess would be that it could refer to "Cranking" or something like that.

Basically, the "C" rating could be there to show us how much amps, or how hard the battery will "crank" the motor over.

 

[Craftydan]

Hi Crew,

Just had a thought...

Vehicle Batteries are rated according to their "CCA", take a look on the top of your vehicle battery next time you are under the bonnet. "CCA" Stands for "Cold Cranking Amps". This is the amount of amps the battery is able to supply the starter motor when you turn the key. Bigger vehicles need a higher "CCA" rated battery to turn the engine over; a higher amount of amps available.

Could it be that the "C" rating on our Li-Po's is somewhat related to the "CCA" on vehicle batteries. My guess would be that it could refer to "Cranking" or something like that.

Basically, the "C" rating could be there to show us how much amps, or how hard the battery will "crank" the motor over.

Good guess, but that's not it. The pure number is a unit of 1/time, not current (not a frequency either, so not formally Hz). It's the inverse of the minimum fraction of an hour this battery can be drained safely (20C can be drained in 1/20 of an hour).

Alone the C rating tells you nothing about the current draw, just how quickly it can be drained.

Of course that still doesn't answer what C stood for . . . perhaps it was the third parameter in the spec list and they didn't have anything better than column "C"? Hard to believe there isn't someone in the industry who knows and shares . . .

BTW, Welcome to the forum!

 

[rockets4kids]

A lucid explanation of the C rating:

http://batteryuniversity.com/learn/article/what_is_the_c_rate

 

[Crazy Professor]

A lucid explanation of the C rating:

http://batteryuniversity.com/learn/article/what_is_the_c_rate

Well, that wraps it all up then.

Thanks for that.