The NiMH AA-cell has an impedance of 25milliohms, while the NiCd Sub-C has an impedance of 6 milliohms. While NiMH AAs could show an initial improvement over the older, well-spent NiCd battery — ...

A British firm, Intelligent Energy, has demonstrated a new iPhone 6 fuel cell that integrated ... value of a hydrogen fuel cell over and above the traditional Li-ion battery, it's Apple.