Mobile terminal and charging method thereof

The invention discloses a mobile terminal and a charging method thereof, and belongs to the technical field of communication. When a processor in the mobile terminal determines that the surface temperature of a secondary battery is greater than a surface temperature threshold and the secondary battery is in a state of charging a main battery, the surface temperature of the secondary battery can bereduced by reducing the discharging current of the secondary battery and/or reducing the charging current of the main battery. Therefore, the problem that the use safety of the secondary battery is relatively low due to continuous rise of the surface temperature of the secondary battery can be avoided, and the use safety of the secondary battery is ensured. 本申请公开了一种移动终端及其充电方法，属于通信技术领域。本申请提供的移动终端中的处理器在确定副电池的表面温度大于表面温度阈值，且副电池处于为主电池充电的状态时，可以通过降低副电池的放电电流和/或降低主电池的充电电流的方式来降低该副电池的表面温度。因此，可以避免出现副电池的表面温度持续升高而导致副电池的使用安全性较低的问题，确保了副电池使用的安全性。