There is an amazing product supercapacitor car battery jump starter on Gadgetplus. It's supercapacitors, no internal batteries. So what is supercapacitors?
A supercapacitor (SC), also called an ultracapacitor, is a high-capacity capacitor with a capacitance value much higher than other capacitors, but with lower voltage limits, that bridges the gap between electrolytic capacitors and rechargeable batteries. It typically stores 10 to 100 times more energy per unit volume or mass than electrolytic capacitors, can accept and deliver charge much faster than batteries, and tolerates many more charge and discharge cycles than rechargeable batteries.[citation needed]
Supercapacitors are used in applications requiring many rapid charge/discharge cycles, rather than long term compact energy storage — in automobiles, buses, trains, cranes and elevators, where they are used for regenerative braking, short-term energy storage, or burst-mode power delivery. Smaller units are used as power backup for static random-access memory (SRAM).
1. No need of precharge at home
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 supercapacitor jump starter that only requires a quick charge from your weak battery to get your car started. This is extremely convenient as you don't need to remember to pre-charge your jump starter.
2. Jumpstart your car in 3mins
The supercapacitor draws up and amplifies the small amount of power remaining in the car's battery, creating the power needed to start the engine in less than 3 minutes. Its supercapacitor technology activates power physically to keep users from the risk of sparks or explosion.
3. Long life span of 20 years
Generally, a lithium-ion battery jump starter has a lifespan of 2 to 4 years. However, SuperCap 2 has a longer shelf life up to 20 years. Thanks to its built-in supercapacitors, SuperCap 2 can withstand more than 100,000 times frequently repeated use in its lifetime.
4. Works in extreme weather
The battery-based jump starters always fail to work in cold weather. SuperCap 2 can work in extremely cold weather (-40℃/40℉) during snowstorms or blizzards and resist high temperature (70℃/158℉), e.g. desert dry-heat environment. It’s ideal for road warriors who seek adventure in extreme weather conditions.
5. Multiple uses
In addition to the cars, SuperCap 2 can be widely used for motorcycles, tractors, and motorboats equipped with a 12V battery. And it can handle up to 7.0 liters for gasoline cars and 4.0 liters for diesel cars.
supercapacitor car battery jump starter