>> That's 0.9 to 1.5 watts.  At 3 volts, current required (0.3 to 0.5
>> amps) exceeds the rated delivery of even an alkaline D cell.

> Really?  My AA-powered flashlight draws about .2A, and MANY applications
> draw momentary power far in excess of .5A...

I was, possibly incorrectly, assuming that the power was required
continuously.  My current capability was based on the "rated drain"
column in the Panasonic Alkaline Batteries section of the Digi-Key
catalog (number Q001, page 515).  Size D is listed as 320 mA; all
other sizes have lower rated drain figures.

                                                Lee Jones