| 摘要 |
A portable battery charger in shape of thumb having a USB connector mounted on a circuit board for controlling the charging process. The circuit board includes a charging terminal unit consisting of a positive and a negative terminal. A housing is adapted to cover the circuit board and fix the USB connector in place. A charging chamber is formed in the housing for receiving one or two charging batteries. The USB connector, the circuit board and the charging chamber are joined together to form a strip-shaped body in a linear axial (x-x) direction, thereby facilitating the carrying and the connection to an electronic product with USB connector.
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