The GB50 is an ultra-portable, lightweight and compact lithium-ion jump starter for 12-volt batteries. With it, you can safely jump start a dead battery in seconds - up to 30 times on a single charge. The Boost XL is safe for anyone to use, featuring spark-proof technology, as well as reverse polarity protection. The GB50 lithium jump starter integrates with a high-output 200 lumen LED flashlight with seven light modes, holds its charge for up to one year and features a USB battery pack for recharging personal devices on the go - up to 6 smartphone recharges. Hot and Cold LED indicators of the internal battery determine when your Boost is outside operating temperatures to help protect your batteries and devices. It's rated at 1,500 Amps, and suitable for use on gasoline engines up to 7 liters and up to 4.5 liter diesel engines, such as a car, van, boat, SUV, truck and more. Included with the GB50, the new HD Precision Boost Battery Clamps easily connect to any 12V lead-acid battery fro