In accordance with an embodiment of a disclosure, a battery pack is disclosed that includes a first battery cell of a first battery type, a second battery cell of a second battery type, a sensor enabled to measure a current and/or a voltage of the first battery cell and/or the second battery cell, a controller enabled to compare a measured current with a current threshold and/or a measured voltage with a voltage threshold, and a switching circuit enabled to connect to the controller one of the first battery cell and the second battery cell, based on a result of the comparison.