Anybody know where I can find this driver for sale?
I think you want this
http://www.mtnelectronics.com/index.php?route=product/product&path=67_115&product_id=473
I guess I should have added more details.
I am looking for the one that runs off of 1 Li-ion cell. The one from led4power.
Ld-2 is not a boost driver.
You cant run XPH50 from 1 battery without boost driver
I re-read the specs and you’re right! I still want one of these.
There is a boost 6V (or 12V) driver design by Tamagochi on Fonarevka. It can run on one high-drain cell.
It can be helpful.