The GB40 is an ultra-portable, lightweight, and compact lithium-ion car battery jump starter pack for 12-volt batteries. With it, you can safely jump-start a dead battery in seconds – up to 20 times on a single charge. It’s a mistake-proof battery jumper starter and booster pack, making it safe for anyone to use, and features spark-proof technology and reverse polarity protection. The GB40 auto battery jump box integrates a high-output 100-lumen LED flashlight with seven light modes – low, medium, high, flashing, strobe, and emergency SOS. It holds its charge for up to one year without being recharged. An internal battery charger power bank can recharge any personal mobile device, like smartphones, tablets, or other USB devices, or be recharged by any powered USB port. It’s rated at 1000-amps and suitable for gasoline engines up to 6 liters and diesel engines up to 3 liters, such as a car, automobiles, motorcycles, ATVs, boats, trucks, RVs, SUVs, lawnmowers, and more. Includes the GB40 battery booster jump starter pack, heavy-duty jumper cables, USB charging cable, 12-volt USB car charger, microfiber storage bag, a 1-year limited, and lifetime customer support.