This rechargeable 1,000 Amp portable automotive jump starter earned The Best rating from the Hammacher Schlemmer Institute because it was one of the only jump pack units that consistently started multiple vehicles. The Best model instantly started four- and six-cylinder engines ten times in a row, unlike inferior units that failed to start either. It was one of the only models that jump started engines after the devices were placed in a freezer for three hours to simulate the effect of sitting in a frozen car. Analysts noted that The Best unit “required minimal cranking” and that it was “one of the easiest units to use.” With short circuit spark-proof protection, a micro-USB port for charging tablets, smartphones, and tire inflators, and an integrated 100-lumen LED flashlight with multiple modes including an SOS and emergency strobe. A three-hour charge via its included USB cable or included 12V DC plug provides the jump starter with power for 20 jumps. Ideal for 4- and 6-cylinder gas engines. Includes HD battery clamps and a storage bag. 8 1/4" L x 4 1/4" W x 4 1/4" D. (2 3/4 lbs.)