The Goodall Jump Pack 12V 10000 Amp JP-12-10000 is a portable jump starter designed for automotive use. With a high 12V voltage and 10000 Amp capacity, it is capable of quickly starting a dead battery. The included LED light feature provides added convenience for troubleshooting and maintenance tasks. This product is ideal for anyone in need of a reliable and efficient jump starter for their vehicle. Will jump start a dead semi. Used twice. Holds a 100% charge.