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Motor vehicle mounted portable telephone for emergency report system, has controller which switches power supply of voltage from auxiliary battery, when voltage from main battery falls below set voltage or stopped
Motor vehicle mounted portable telephone for emergency report system, has controller which switches power supply of voltage from auxiliary battery, when voltage from main battery falls below set voltage or stopped
A controller (12) maintains the voltage of main battery (4). When the supply of voltage from the main battery of the vehicle stops or falls below the set voltage, the controller switches the auxiliary battery to supply voltage.
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