Perhaps not 100% applicable to our old car hobbyists but very interesting information on new battery technology. Fisker electric cars I believe have already tested this technology. With a recharge time of 3 minutes they are able to drive for 800 km before recharging.
These super capacitor batteries can be discharged 100% and have a cycle life of 1 million, compared to the the normal chemical battery cycle life of only 5000. These super capacitor batteries are manufactured by Eco labs in Dubai. They are expanding their manufacturing facility to include the manufacturing of normal car batteries, lap top batteries and mini batteries for watches.
They currently offer a 10 year replacement warranty on any of their batteries that might fail in that time period.
The battery looks different for what we are used to.
Please see:
https://www.pscprojects.co.za/kilowatt.html