Our RiderWays powerbank/jump starter charges phones; tablets; speakers and other portable USB devices AND starts gas engines up to 6.4l (diesel up to 3.2l)!/ It fits easily in your pocket or glove box for emergencies. Long-lasting high density 8000 mAh lithium battery with sandstone finish led indicator lights. Includes USB car charger and jumper cables. Note: car battery should be no less than 75% charged for successful jump start. 3" L x 6 5/8" W x 1" D. This is a road tested product by RiderWays staff.