Most folks do not know that the "A" fat cell (18mm dia and 57mm long) made
    by Sanyo (NiMH) has a whopping calculated 390 Watts/Litre...

Isn't that 4/3A ?  At least, they're about twice the length of the 2/3A
lithium camera batteries?

    L-ion is lighter has less cycles and not that much
    advantage in volume, only by weight.

By Amp-hour, or watt hour?  Don't forget that the Li-ion cells have 3x the
voltage of a NiCd.  From an electronics perspective, the output voltage
(from a single cell) is enough to power many circuits directly, which is
quite nice...

BillW