RE: Hybrid power plant.
I have also been looking atteh A123 cells which a pack of 2S is 7.2 volts fully charged, which seems to be a perfect drop in for Nicd and Nimh packs. The current ones are at up to 2700Mah, if you want more run time a pack of 2S2P will give you 5400Mah of run time while have the same or lower wt than a NiCD?NiMH equivalant.
Problem here is taht my current Lipo chargers do not support charging A123 cell type or also know as LiFeP04 batteries