| 摘要 |
A battery module of a portable electronic device comprises a shell structure, a first battery, a second battery, and an engaging set. The shell structure having a plurality of electrodes forms an electrical connection with the first battery or with the second battery alternatively. The engaging set comprises a first engaging union and a second engaging union. When the first battery is selected, the first engaging union and the first battery are engaged together to form an electrical contact between the first battery and the electrodes. Alternatively, when the second battery is selected, the first engaging union and the second engaging union are engaged together to form an electrical contact between the second battery and the electrodes.
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