Gone are the days of flooded engines and manual chokes to get your car started, but that pesky battery still has a habit of failing at the most inconvenient of times. This unit is amazing. Barely larger than a smartphone, and probably even lighter, but packs a huge power punch to get your car started. With a peak current available of 400 amps, it’s powerful enough to get just about all but a tank running. Of course, sometimes emergency phone power is just as important as starting a car, so a 5V 2.1A USB port is provided to get you powered back up. It even includes a cigarette lighter socket charging adaptor, so it never has to leave your car (just remember to charge it when your battery is NOT flat!). In case it’s dark, it also incorporates a clever high-power LED, which can operate as a torch or flashing warning light. These devices are now so reliable that similar ones are used by roadside service operations instead of jumping from their own vehicle! If you have more than one vehicle in your family, one for each is a very sound idea.