Portable jump starter and air compressor device

A portable jump starter and air compressor device, comprising:

• one or more rechargeable batteries;
• a jump starter connected to and powered the one or more rechargeable batteries;
• and
• an air compressor, comprising:
• an electrical motor connected to and powered by the one or more rechargeable batteries, and
• an air compressor unit connected to and driven by the electrical motor, the air compressor unit including a piston assembly having a piston, the piston comprising:
• a lower piston having a center hole,
• a piston ring connected to the lower piston,
• an upper piston having an indent or cavity on a top of the upper piston, and
• a seal positioned in the indent or cavity of the upper piston, the seal and the top of the upper piston being substantially flush.