POWER SUPPLY SYSTEM FOR A POWER TOOL

Power supply systems for a power tool and power tool systems are provided. A power supply system for a power tool includes a first battery control circuit operable to interface one or more first batteries, the first battery control circuit having a first positive terminal and a first negative terminal. The power supply system further includes a second battery control circuit operable to interface one or more second batteries, the second battery control circuit having a second positive terminal and a second negative terminal. The power supply system further includes a first diode electrically coupled between the first positive terminal and the second negative terminal. The power supply system further includes a second diode electrically coupled between the first negative terminal and the second positive terminal.