| 摘要 |
<p>Disclosed herein are a battery device for preventing danger caused by battery overheating in a mobile terminal, and a method of operating the battery device. In the battery device, a battery state sensor periodically monitors a change in the state of a battery during operation or charging of the battery, and outputs a predetermined signal corresponding to the monitored state change, a controller senses a battery overheating- caused danger from the signal received from the battery state sensor and outputs a control signal, and an automatic locker separates the battery from the mobile terminal according to the control signal received from the controller.
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