| 摘要 |
A battery charger designed to be installed in a vehicle, and while utilizing a portion of this vehicle's electrical system, can be used to charge another vehicle's battery or batteries. This battery charger has a polarity sensor, and when properly connected to an external battery will automatically switch away from charging the internal battery to charging the external battery or batteries. And, when dis-connected from the external battery or batteries will automatically switch back to charging the internal battery, thus making it an automatic vehicle to vehicle battery charger.
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