Sleep is a helluva drug.

I only glanced at the article originally and don't even want to give it the hit count to double check their claims, so forgive me if I'm way off base. But is the claim possibly more accurate that the battery will never experience battery death? That's a different statement than a battery that never dies.

Your classic conventional lithium battery, for example, can be recharged but only so many times before the chemical materials inside it permanently cease to function. There is liquid battery technology out there that allow batteries to be forever recharged, due to remaining totally liquid and never having a chance to corrode into non-conducting material.

If that's the claim of this, then it is accurate. Although not HUGE news, because liquid batteries have been a known discovery for some time. There are even some liquid battery power plants, that allow the storage of energy created indefinitely due to their liquid battery cell nature.