>> You should also look at the actual mAh available from each cell.<<

I did. That's how I calculated the "power density" for the various cells.

Off the top of my head, the D cells are rated at over 20,000 mAh, C cells at a little over 8,000 mAh, AA at a little under 3,000 mAh for alkaline and 3,000 mAh for Li, etc. See the Energizer site for details.

Tom