Maybe something like this Aurora AK-P7-3 SSC P7-C 5-Mode 900-Lumen LED Flashlight (2*18650), shorthen the body and convert it to accept an external battery pack.
2s5p Battery pack
or a 2s2p battery pack like my own if you don't need the extended runtime:
The 2s2p is charged through the 9 pin sub-D receptacle with a modified 2 cell charger. Each slot of the charger is connected to a pair of 18650 cells (More info in this threadhttps://www.candlepowerforums.com/threads/225285)how do you charge the 2sp5 lot?
I just saw that P7-D bin lights are out.
I'm particularly interested in this one, because it is the smallest of the 3 P7-D lights I see on DX.
Anything wrong with this, or would I be better off sticking to the smallest of the P7-C http://www.dealextreme.com/details.dx/sku.12060
sku.22567 has the advantage of one less mode, larger reflector, shorter overall length, while being negligibly heavier.