A fast charging high energy storage capacitor system jump starter is described. The jump starter apparatus incorporates a method of using extracted energy from a battery pack, such as a battery pack used with a portable power tool. The extracted energy is stored at a higher DC potential level by the capacitor system after being boosted or stepped up by a boost/convertor circuit. The stored energy is then available for use in starting a motor vehicle whose vehicle battery as become depleted such that it does not provide enough energy for its intended purposes. The disclosed system and method provide for the motor vehicle battery, combined with a fast charging high energy capacitor bank, to enable the rapid and effective way to jump start a vehicle.