[frodus]

Originally Posted by CroDriver

Cool project
What do you mean with conservative?

5C
10C
15C

The voltage sag @ 15C is pretty heavy.

I'm thinking about replacing my ThunderSky batteries in my car with this Headway cells. When I'm calculating the power output I'm using 15C as the maximum

A 20C peak is a little conservative. A recent customer tested these cells at almost 50C for 7 seconds. The voltage does sag, but they deliver current. Its not bad for these 10Ah cells. 20C peak currents for a few seconds is going to be just fine. The graphs you posted are continuous current graphs.

So far, they're good cells and customers have been happy. I can't wait to do some more testing.