How many times do you find a drained jump starter when you need it? Unlike lithium-ion jump starters that require regular pre-charging at home, SuperCap 2 is a super capacitor jump starter that only requires a quick charge from your weak battery to get your car started. It works in extreme weather and an amazing long lifetime. This is extremely convenient as you don't need to remember to pre-charge your jump starter. In addition to the cars, SuperCap 2 can be widely used for motorcycles, tractors, and motorboats equipped with a 12V battery.