Not sure if this counts as "new technology," but I wasn't sure where else to post this. Has anyone tried an LR123A li-ion battery with a lightsaber? I found one Yahoo! Auctions Japan, and saw that it was 3.6V and (supposedly) 2000 mHa. I didn't look closely at the dimensions, but judging from the photo and the capacity, I was expecting something about the size of a C battery. Imagine my surprise when this tiny thing arrived.
Attachment 6474
As you can see, it's slightly fatter than a 14000 (16.5 mm) and much shorter (33.9 mm). 2000 mHa is probably a bit of an exaggeration, and I saw somewhere online the figure 1800 mHa, which is probably closer.

Either way, it's pretty amazing to pack this much capacity into such a little package. Has anyone tried this with a saber yet? Is there a catch that I'm missing here? This seems too good to be true. If this could power a Petit Crouton or Crystal Focus and a 3 or 5 volt LED for more than 30 minutes or so, it would be a godsend.