yup 2 or 3 perfectally connected in parellel would be great for applications like that.
the problem is the lack of very good quality 2-3 To D adapters, which could make doing that not just a bad idea but even could split a cell or soemthing.
BECAUSE
You cant charge a lithium primary cell, and if the connections suck that COULD happen, its not likly and its not likly to cause huge problems, it just could.
and the shoslime adapter is a perfect example of the usual trash battery holders and adapters we get :-(.
there are AA to D battery adapters made at the forums here that dont have the connection issues. problem is they are usually series, and can be rewired for parellel easily, and they arent cheap.
how it happens is something like this:
one cell is not connected as well as the other, that other cell is getting most of the load of the light, and it discharges faster than the one poorly connected. then you take off the load (turn off the light) and the battery of the higher state, tries to charge the battery of the lower state, and lith primaries dont want to be charged.
As Long As the parellel items would stay well connected, everything would go fine.
an alternative, although not cheap by any means, is D sized Lithium primaries, they handle only so much load, and cost ,, some 1/2 million dollers each
there is a post about them if you search for "Lithium D" cells, its NOT the computer ones, its a higher discharge one.
