Led Lenser M1 + 16340 3.7v?

Art

Enlightened
Joined
Oct 19, 2008
Messages
395
Location
Portugal
Hi,
does anyone here have this light?

I cant find much info on it , some say it lowers the output when its hot... other say its a time control that lowers the output.

Also , its a 3v light , anyone tested it with 4.2v? :D
 
Hi,
does anyone here have this light?

I cant find much info on it , some say it lowers the output when its hot... other say its a time control that lowers the output.

Also , its a 3v light , anyone tested it with 4.2v? :D

I can't much info either, but since LL's are known to use DD, I would think it's ok... But it probably wouldnt be good for the LED....
 
I can't much info either, but since LL's are known to use DD, I would think it's ok... But it probably wouldnt be good for the LED....

LED lights last too long... I think some of my lights will outlast me :crackup:

My idea is if it is able to use max with 4.2v for short periods of time to search far things and then switch to low and use it normally.
 
Actually, the M series is all regulated, unlike the P series, and Li-ions only go to 3.7 volts once they are loaded, so I will say it is fine, although I will not personally guarantee anything.
 
I can't much info either, but since LL's are known to use DD, I would think it's ok... But it probably wouldnt be good for the LED....

Here we go again :shakehead
No. The M-series do not! I have an M1 and it's using a proper driver with boost circuit. Is has to since the 3 v of a single 123 is too low for driving a white LED to decent level.

Personally I wouldn't use 3.7v LiIon in that light unless manufacturer says it's OK. If they don't it's because it uses a typical boost circuitry.
But a 3.2v LiFePO4 should be fine since it's voltage is still below the LED.
Bought some from DX and they seem to work wonderfully.

DD such a small light is not very good practice. In fact it's never IMHO with LiIon. When cell is freshly charged it draws some heavy juice. At least one should use a couple of AMC7135 to limit current when freshly charged.
 
Hi, I got the m1, its a great light vith plenty of throw, wont work with 16340 3.7 v, just shut off, but works fine with my tenergy rcr123a 3.0v.
I am really impressed with this light, totaly outshines my fenix P2D in spot and flood, But low mode isnt low at all. Hope this helps.
 
Well, the Fenix LD01 uses a boost circuit, too - but 3,7V batteries work. Maybe there is a chance that, like the LD01, the M1 will go into dd then? Or is it a proper dd in the LD01? The runtime graphs are sometimes misleading...
 
Actually, the M series is all regulated, unlike the P series, and Li-ions only go to 3.7 volts once they are loaded, so I will say it is fine, although I will not personally guarantee anything.


Incorrect. Li-ions (excepting Li PO4) are nominally 3.6/7 volts. Off the charger, though, they are closer to 4.2/.25 volts.

If the driver circuit in this light is boost only, it may try to boost the voltage from the battery up even further, and fry the LED.

If you feel that it is worth possibly damaging the light, go ahead and try it, if not, don't.
 
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