The GB20 is a portable lithium-ion battery jump starter pack that delivers 500-amps for jump starting a dead battery in seconds. It features a patented safety technology that provides spark-proof connections and reverse polarity protection making it safe and easy for anyone to use. It's a powerful battery booster that doubles as a portable power source for recharging USB devices, like a smartphone, tablet and more. Compact, yet powerful lithium jump starter rated at 500 amps up to 20 jump starts on a single charge.An ultra-safe and mistake-proof design with spark-proof technology and reverse polarity protection, which allows it to safely connect to any battery.An ultra-bright 100 lumen LED flashlight with 7 light modes including SOS and emergency strobe.Recharge your personal devices on the go, like smartphones, tablets, e-watches and more - up to 4 smartphone recharges.Designed for gas engines up to 4 liters such as ATVs, motorcycles, cars, boats, lawn equipment, and more.New Accessory: Includes Precision Boost Battery Clamps designed to easily connect to any 12V lead-acid battery from powersports to trucks.