From what I gather.....C means capacity? If you're charging nicads or metal hydrides, if the "C" is 1500A or 1.5A, the charge rate should be 10% of 1500=150ma.............if you're charging lipos and the "C" is 1500A or 1.5A, the charge rate should be 1500ma.....is that correct? when someone posts how to charge batteries, I find it troubling if the charge rate is not identified with the particular type of battery they're talking about....there seems to be a whole lot of difference on the charge rates.......2nd question....I think that buying a battery pack that your can monitor/charge each cell is the way to go, seeing as how a single cell can have an effect on the battery, even ruin it by overcharging and all those other ways lipos can go bad..wish I'ld have known that sooner. Please let me know if my thinking is on or OFF......Thanks guys