The electrode in sulfur-based batteries would normally dissolve into the electrolyte too fast with each charging cycle, and this is turn lowers the capacity of the battery. Sony claims that their new batteries will sport 40% more capacity thanks to the new sulfur compound which will function differently from normal ones. In other words, a similarly sized 3,220mAh battery might theoretically speaking, deliver up to 4,500mAh of battery life, now how about that for progress?
We will still need to wait before Sony commercializes these batteries though, but at the very least there is that promise of a brighter future. It is the waiting part that is excruciating. [Nikkei Translated Page]