Argonne scientists have discovered that older battery anode types made of silicon carbide (currently used are the graphite ones), which have earlier fallen into disuse because of their instability, when covered with graphene turned out to be stable, and double battery capacity. One extra side-effect is reduced battery weight - now by ca. 16%, but scientists assume that in the near future the reduction might reach the level of 50%. This means a three-fold increase of battery capacity, while maintaining the same weight.Unfortunately, first the new battery will power electric cars and power engineering; this will possibly happen in two years time. Only later they are planned to be made available for everyday use.