a multi - battery system for high - voltage applications with proportional power sharing comprises a circuit having a circuit positive and a circuit negative terminal . at least two batteries are provided to combine to deliver required system power . the batteries are connected to a protection circuit , energy storage means , system output voltage sensing means and a logic gate . protection means generates a protection signal and the voltage sensing means generates an enabling signal that are fed into the logic gate as true signals to generate a true control signal . the true control signal causes the energy storage means to discharge . the digital enabling signal for each of the circuits is time - shifted by a time “ t ” so that at any time one of the circuits is discharging and one of the at least two circuits is charging during said time “ t ”.