Patent ID: 7915855
Filing Date: 2011-03-29
Classification: G06F

Abstract:
1. A portable terminal, comprising: a main battery for supplying power; an auxiliary battery for supplying power independently of the main battery; a switch module for controlling the power supply of the main battery and auxiliary battery; and a power unit controller for controlling on-off settings of the switch module for measuring a first charge level of the main battery and a second charge level of the auxiliary battery; for selectively supplying power from the main battery or from the auxiliary battery based on the measured first charge level and the measured second charge level; for disconnecting the auxiliary battery to the main battery if the measured first charge level of the main battery is higher than the measured second charge level of the auxiliary battery; and for connecting the auxiliary battery to the main battery if the measured first charge level of the main battery is lower than or equal to the measured second charge level of the auxiliary battery.