Why haven't super capacitors replaced batteries yet?

With promising results of graphene, it is quite possible that Super-super capacitors may replace batteries. As soon as they are in the same order of magnitude, it is time to think about it. read more

Super-capacitors are suitable for some applications. China now has a super-capacitor powered tram car. You can read about it in various articles linked here - Google Generally the technology looks promising for short time frame energy supply and re-capture such as in electric vehicles with regenerative braking. read more

Battery does not generate energy. it just stores. like a super capacitor. it is the energy density that differs. so a super capacitor needs to be much bigger and heavier to a comparable lithium battery. read more