A recharging device with voltage detection for an alkaline primary cell includes an oscillating unit that generates a pulse signal from an input power to charge the alkaline primary cell. The recharging device also includes a detecting unit configured to be electrically coupled to the alkaline primary cell. The detecting unit is also configured to detect a voltage of the alkaline primary cell and output a corresponding detection signal. The recharging device further includes a control unit electrically coupled to the oscillating unit and the detecting unit. The control unit controls the oscillating unit to operate in one of a first charge mode and a waiting mode based on the detection signal output by the detecting unit. The oscillating unit outputs the pulse signal when operated in the first charge mode and discontinues output of the pulse signal when operated in the waiting mode.