A portable power bank designed to jump-start vehicles with dead batteries and also act as a power source for electronic devices. It typically features a high-capacity lithium-ion battery, like 8000mAh, and provides a starting current of around 500A with a peak current of 1000A. These jump starters often include safety features like overcurrent protection, short-circuit protection, and reverse polarity protection. Some models, like the USAMS ZB287, also integrate an air pump for inflating tires.