C is the first letter Capacity, used to disclose the size of the current value display battery charge and discharge. 
For example: a rechargeable battery rated capacity when 1100mAh, revealed that displayed 1100mA (1C) sustainable one hour discharge time, as to 220mA (0.2C) discharge time of Sustainable 5 hours. 
Termination voltage (Cut-off discharge voltage) 
Means the battery discharge when the voltage drops to a minimum obligation is not appropriate to continue to discharge the voltage of the battery. 
According to the type of battery and substandard substandard discharge premise of the battery capacity and lifetime requirements are not together, so polite discharge termination voltage lithium batteries is also not the same.