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I Have tested these units my self, they will start my landcruiser 4.2L turbo diesel (1hdfte) motor with no battery connected just the jump starter, This is the only jump starter i have found that would start my car by its self. Amazing product.
Weighing only 615g, the Thunder Jump Starter is a compact but powerful power supply.
Producing 600 cold crank amps, its three 3.7A/4.2V lithium cells has a capacity of 18,000 milli ampere hours. Not only can this restart a V8 engine, it is enough power to:
Jump start a small capacity car up to 40 times
Charge a mobile phone approximately 10 times
Supply power to a laptop for up to six hours
The Thunder Jump Starter comes with three common phone charger cables, eight popular laptop connections, a 12V 10A power socket and even a built in torch. Portable power has never been so accessible.
Easy to use and recharge, the Thunder Jump Starter can be charged from either 12 or 240 volt systems, such as the car or at home prior to use, making it the perfect companion for travelers, campers and adventurers.