The NOCO Boost GB40 is an ultra-portable, lightweight, and compact portable lithium 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 portable car battery jump starter battery booster pack, making it safe for anyone to use, and features spark-proof technology and reverse polarity protection. The GB40 portable car battery jump starter integrates a high-output 100-lumen LED flashlight with 7 light modes, including low, medium, high, flashing, strobe, and emergency SOS. It can hold its charge for up to one year without being recharged. Its internal battery can recharge any personal mobile device like smartphones, tablets, or any other USB device, which can 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 cars, motorcycles, ATVs, SUVs, trucks, boats, lawnmowers, tractors, and more.