Unfortunatley it seems there is now Company(Philips Zetex orMaxim) that offers a Regulation that boost only round about 2,1V to 2,7V U(in) to attention please
--- 700mA I(out=@LED) at round about 3,8Volt U(out)---
a XXXJ Bin is not usual it´s rare. And don´t forget that Every LED is unqiue.
My Xm-3 Clone is in my Eyes very inefficient but it really will work good with Alkalies too. Such a U(in)= ca.2,4V Flashlight with real Lux3 Output will NOT work with Alkalies for a long time! You need at least 2 good AA NiMH´s or better C or D Size NiMH´s. Of course you don´t have to store the Rechargables to long.
Maybe silverfox will test the Voltages at Highcurrents (0,5 & 1 C) after maybe 40 and 60 days storage @room Temp for Nimh´s and Li ionen too.
by the way
Such a Regulation will drain up to 2 Ampere if good 1,6Ampere if very good Efficient, Low Vf Bin and good Batteries Voltages at high loads than maybe 1,3A.
Now you see that it´s only a little market for such a REAL HighCurrent Flashlight. The LED´s are availables, the Rechargables are good what You and I and a few boardis too are looking for is the efficient regulation that is abled to handle the Vf behaviour of course with overdischages Protection.
The new LRI proton maybe will be the first REAL highcurrent Flashlight.
I would like to have a 2C with real 650-700mA@ the LED Flahlight too but i think it´s a too small market.
You have to know that such a Flashlight have big problems
-with the Battery Source
-needs a different switch construction.
-needs buyers that know what they buy. Normal Buyers don´t know what the difference is between Carbon Zinc and Alkalies primaries! :-D
-buyers needs a big wallet . I think such a flahlight will be hard to build for 30-40 EUR. i think round about 40-60 EUR will be a cheap price.
When i can decide i would like to buy Li ionen Rechargabels like i can buy NiMH´s right now.
Already One Li-ionen Cell is closer to the Voltagesneeds for a LED than 2 NiMH singel Cells.
That are the problems with such a construction. :-(