Abstract: A battery management system comprises: a circuit path electrically coupling a battery and a load; a backup storage device; a first switch connecting the battery and the backup storage device; a second switch connecting the backup storage device and the load; a sensor for measuring a temperature of the battery; and a controller in electrical communication with the first switch, the second switch, and the sensor. The controller executes a program to: (i) activate the first switch to connect the battery and the backup storage device for charging the backup storage device for a charging period of time with power provided by the battery based on the temperature of the battery meeting a threshold, and (ii) activate the second switch to connect the backup storage device and the load for providing power to the load from the backup storage device after the charging period of time has expired.