ORIGINAL: Missileman
"C" stands for the battery Capacity measured in mah or milliamp hours.
ie.... 1700mah battery C=1700ma or 1.7amps
Well, with a 1700 mah battery, C=1700 milli-amp hours (mah) or 1.7 amp hours (Ah). An Amp is a current, not a capacity.
If you have a 1 Ah battery, then if you pull 1 Amp of current off the battery, then it will theoretically last for an hour before it is empty.