Patent ID: 7449875

Claim:
A device for automatic detection of battery polarity, comprising a plurality of detector terminals, a plurality of detector units, a plurality of positive voltage electrical connecting units and a plurality of negative voltage electrical connecting units, wherein operational procedure involves first connecting battery electrical conducting units with the plurality of detector terminals, when the detector terminals are connected to positive poles of the battery, then one set or more than one set of the detector units detect positive voltage, which actuate an electrical connection with the positive voltage electrical connecting units, at the same time one set or more than one set of the detector units determine negative voltage and actuate the negative voltage electrical connecting units, thereby forming a complete circuit and enabling current to flow from the positive voltage electrical connecting units, wherein the plurality of detector terminals is more than two and a detector circuitry of the detector units being configured so that connecting the battery to any two of the plurality of detector terminals enables the detector circuitry to form the complete circuit.