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 . as well as reverse polarity protection. The GB40 portable car battery jump starter integrates with 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 be used to recharge any personal mobile devices 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 use on gasoline engines up to 6 Liters and diesel engines up to 3 Liters . such as a car . motorcycle . ATV . SUV . truck . boat . lawnmower . tracor and more.