The GB40 is a portable, lightweight, and compact lithium-ion car battery charger 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 battery booster pack, making it safe for anyone to use, and it features spark-proof technology and reverse polarity protection. The GB40 is a battery jump pack with an integrated 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 pack 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 1,000-amps and suitable for gasoline engines up to 6.0-liters and diesel engines up to 3.0-liters, such as cars, automobiles, motorcycles, ATVs, boats, trucks, RVs, SUVs, lawnmowers, and more.