[miahi]

The article says "100 times greater than TDK’s current battery in mass production" but they are not referring to the current LiIon/LiPo batteries, but the current _solid state_ battery. The capacity per liter of the new solid state battery is less than 2x of the current phone batteries (1000Wh/liter vs 5-700Wh/liter for LiPo). So no, you cannot replace one phone battery with a coin cell with the same battery life.

[danudey]

Oh, good catch. Thanks for the correction!