Vehicle battery jump starter with multiple battery pack compatibility

A vehicle battery jump starter system comprising:

• a rechargeable power tool battery pack;
• and
• a vehicle battery jump starter including:
• a battery pack interface configured to receive the rechargeable power tool battery pack,
• a power boost module including one or more energy storage devices,
• an output port configured to electrically connect the vehicle battery jump starter to a vehicle battery,
• a first switch electrically connected between the power boost module and the output port,
• a converter circuit electrically connected between the battery pack interface and the power boost module,
• a second switch provided on a current path from the battery pack interface to the vehicle battery;
• and
• a controller including an electronic processor configured to:
• charge, by the converter circuit, the one or more energy storage devices included in the power boost module with current from the rechargeable battery pack,
• activate the first switch to discharge current from the power boost module to the vehicle battery, and
• activate the second switch to discharge current from the rechargeable battery pack to the vehicle battery.

A method of jump starting a vehicle battery, the method comprising:

• attaching a removable and rechargeable power tool battery pack to a vehicle battery jump starter, the vehicle battery jump starter including a power boost module including one or more energy storage devices, a jump start switch, a bypass switch, and a controller including an electronic processor;
• electrically connecting the vehicle battery jump starter to the vehicle battery;
• closing the jump start switch to discharge current from the power boost module to the vehicle battery;
• and
• closing the bypass switch to discharge current from the removable and rechargeable battery pack to the vehicle battery.