Radiocontrol:

I didn't have any questions relating to NiMH vs NiCd batteries. Many of the metal hydride battery packs have higher capacity than NiCd packs. This is one of the advantages - in many cases they will have more capacity for the same or lower weight.

However, if the NiCd and the NiMH batteries are the same capacity (as per your earlier post), there is no way that the metal hydride batteries will last twice as long!!

Capacity is capacity, irrespective of the chemistry. The only exceptions relate to high current draw applications where some battery types are better able to deliver their energy faster due to lower internal resistance. (NiCd's are superior to NiMH in this respect)

If you have information to the contrary with regards to capacity, please share it.

Ross