I agree with you, however, to fully charge a battery with 1C in only 10 minutes means you'll charge about 1/6th of it's total capacity. And I would say that's pretty far away from normal. I have some new batteries 4.400mAh and I charge them at 10A, roughly 2.2C, and it takes about 30 minutes to a fully charge. Which means exactly 1 hour at 1C. Actually, the battery capacity is given considering maximum tension (4.2V) and the absolute safe minimum of 3.4V and not 0V