| 摘要 |
The battery pack holds a thin outline battery in an external case. The external case is provided with openings exposing the front and back of the thin outline battery to the outside, and is formed in the shape of a square frame which covers both sides and both ends of the thin outline battery. The thickness of the external case is essentially equal to the thickness of the thin outline battery, or the external case is made thinner than the thin outline battery.
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