| 摘要 |
A battery charger for wirelessly providing additional operating time for a cell phone with a depleted battery. The battery charger has a charging unit incorporated into a case. The charging unit has an external port, a cell phone charging port, and a rechargeable battery. A cell phone with a depleted battery is placed inside the case and plugged into the cell phone charging port. The rechargeable battery of the charging unit recharges the cell phone battery, without requiring that either the battery charger or the cell phone be plugged into an external power source. An ON/OFF switch allows the user to enable/disable recharging. A status indicator light indicates the status of the battery charger. When the battery in the charging unit is depleted, the user plugs the charger into a standard external power source to recharge.
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