Quote:
Originally Posted by jasmine2501
It reduces the voltage drop under load. The C rating is actually defined as the maximum current you can pull without suffering a significant voltage drop. It is an actual number, but it's expressed as a factor of the capacity, so when the capacity goes up, so does the C rating, not the factor, the actual number.
So, a 30C 1000mah has a C rating of 30 amps, but the 30C 2000mah has a C rating of 60 amps. So your 30 amp car will cause a significant voltage drop on the small battery, but not on the big one. Same c factor, different c rating.

Quote:
Originally Posted by jasmine2501
Brontide, that's why i made it clear that the C rating is the actual number of amps, not the factor. That's just how it's expressed, so the C rating is 40 amps or whatever, it's not the number before the C.

I understand you are trying to make it easier to grasp, but talking about a seperate Crating and CFactor isn't helping, I think, it just makes it more confusing. A Crating is not in Amps, it's just a number. The C number is simply what you need to multiply the battery's capacity with to get the current this battery can deliver without it's voltage collapsing and/or the battery overheating.
You can't simplify that, the only way to determine how much current a battery can deliver is by simple math, a single calcucation. The outcome of that calculation is what matters. Crating without taking into consideration the capacity of the battery means nothing, and capacity alone means nothing either. As brontide explained, it's a relative number, and as such, you can be tricked thinking into just looking at the Cnumber. But it is as it is, and once you know how it works, it's easy to compare batteries.