There are several commonly used methods for charging Nickel batteries. They are all related to the length of the charge cycle which determines the recommended charge current. A slow charge (or low rate charge) consists of a relatively low charge current, typically 0.1C, applied for approximately 14 hours set by a timer. A quick charge applies a constant current of approximately 0.3C to the battery while a fast charge applies a constant current of 1C or higher. Both quick and fast charge cycles require that the charge current terminate when the battery becomes fully charged.