this mega-micro?
http://www.candlepowerforums.com/vb//showthread.php?t=215313
400 lumen?
from a protected voltage regulated LiCo cell?
I'm curious.... What kind of current does this flashlight pull from a CR123? Anything more than about an amp is going to be unsafe for that little cell.... I'm betting it's closer to 2-3 amps. in which case, those cells won't last long, and will become very unsafe within a few dozen cycles....
Eric
PS (edit in).... a number of people from this forum have used all-battery and have overall good things to say. I haven't heard of any major complaints myself, but do keep in mind that the brands of cells they sell (for the most part) are on the "lower" end of the spectrum as far as quality goes... The Tenergy and Powerizer brands aren't the worst, but they aren't great either. However, a number of people have reported good results using those tenergy voltage regulated 3.0V RCR123s in various flashlights that require the reduced voltage input.... (can't handle 3.7V cells)...
In your configuration, I would be more apt to suggest using some AW brand LiFePO4 cells. While having lower capacity and probably less runtime, they would be far safer for your high current flashlight.
Just a few comments and observations from the sideline.
First, I agree with mdocod that you may want to invest in better quality cells. AW used to sell some protected 3.0 Volt Li-Co cells that were diode corrected from 3.7 Volts down to 3.0-3.4 Volts. I don't think he offers them anymore, but you might contact him to see if he has any. I have used the unprotected Powerizer 3.0 Volt Li-Co cells and have had no problems running them up to about 1 Amp. This is no doubt pushing them though. Use at your own risk!
The LiFePO4 cells, generally, aren't rated for more than 1C in this size range. You may be able to push them farther, but again, use at your own risk. At least they're "safe" chemistry, but you may "kill" the cells.
Now, just some pure observations.
People that consider any Fenix light, for example, to be "high end" probably won't be buying one of these lights.
Considering my first observation, most folks will understand that this light may or may not be pushing the limits.
Being familiar with the bins of LED's that Mr. Mania seems to come up with, it's likely that their flux bin, and Vf are extremely good.... or, better. This would at least, tend to make me think mdocod's amp draw estimate may be high.
If Mike says it'll work, my own opinion is, it will.
Just thought I'd throw in my opinion, and that's all it is, my opinion. Consider the observations a freebie.
I might add that I certainly don't have any experience with lights that draw up to 1700mA's from a 3.7 Volt unprotected RCR123, and were/are considered "unsafe". Or do I?
Again, listen to mdocod, and try and find some premium cells for your application. I think it would be worth the investment.
Dave
I have a feeling these Tenergy cells might just wind up living in a dark corner of my closet after a quick check to see how the MM works with rechargeables. :tinfoil:
