... , after that it needs replacement. While,the lithium-cycle life is closely related to the completion number of ... times. It is simple to understand "a charge cycle" -a process that power of the BP-315 ... twice, the charging time of the battery whose charge cycle is 10 hours is only 8-hour. Therefore, ... the rechargeable BP-315 Battery finishs its charge cycle when it is fully charged after it has been ...