A method includes configuring a battery and a voltage regulator configured to regulate an output voltage of the battery to supply power to a memory of an electronic circuit also comprising non-memory circuitry. The method also includes switching the supply of power between the battery and the voltage regulator such that: the memory is powered from the battery when the non-memory circuitry is inactive, the memory is powered from a combination of voltage from the battery and the voltage regulator when the memory is about to communicate with the non-memory circuitry during a transition of the non-memory circuitry into an active state thereof, and the memory and the non-memory circuitry are powered from the voltage regulator during the active state of the non-memory circuitry. Thus, minimal current is drawn from the battery while a state of the memory of the electronic circuit is preserved.