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A device to which a plurality of battery cases having different nominal voltages are selectively mountable and which checks the battery voltage of a mounted case comprises signal apparatus provided on each of the cases and which emits a discrimination signal capable of discriminating which of the ca

A device to which a plurality of battery cases having different nominal voltages are selectively mountable and which checks the battery voltage of a mounted case comprises signal apparatus provided on each of the cases and which emits a discrimination signal capable of discriminating which of the cases has been mounted, voltage check apparatus including a plurality of voltage check circuits corresponding to the cases to check each of the output voltages of the batteries contained in the cases, and apparatus operatively associated with the signal apparatus during said mounting for selecting one of the voltage check circuits in accordance with the discrimination signal and applying to the selected voltage check circuit the output voltage of the battery contained in the mounted case as a voltage to be checked.

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A device to which a plurality of cases containing therein batteries capable of applying different nominal voltages are selectively mountable and which checks the battery voltage of a mounted case, comprising: signal means provided on at least one of said plurality of cases and emitting a discriminat

A device to which a plurality of cases containing therein batteries capable of applying different nominal voltages are selectively mountable and which checks the battery voltage of a mounted case, comprising: signal means provided on at least one of said plurality of cases and emitting a discrimination signal to indicate which of said cases has been mounted; voltage check means including a plurality of voltage check circuits corresponding to said cases to check each of the output voltages of the batteries contained in said plurality of cases; and selector means operativey associated with said signal means during said mounting to select one of said plurality of voltage check circuits in accordance with said discrimination signal and apply to said selected voltage check circuit the output voltage of the battery contained in said mounted case as a voltage to be checked. In a load device to which a plurality of battery cases having different rated voltages from each other are selectively mountable and which is operable by the output voltage of the mounted battery case, a device for checking the output voltage of the mounted case, comprising: a pair of input terminals provided on said load device to be connected to a pair of output terminals of the mounted battery case; voltage check means having a plurality of voltage check levels corresponding to said rated voltages to check the voltage applied to said input terminals; and means for selecting the check level corresponding to the said rated voltage out of the plurality of said check levels.