MJLED batt. test

B

Buck268

Joined
Nov 5, 2006
Messages
1,864
Well, I've gotten really curious to see how my MJLED will do in a battery test. Now I'm no scientist, so I'm just gonna let it go until it looks "too dim". The point at which during use, I would change the batteries.

Anyways, I just turned it on, so we'll see how long it lasts in a 2AA mini mag.
 
Going on 17 hours and still very bright. Maybe not half-brightness or whatever, but noticably dimmer. Still extremely useful, brighter than stock bulb.
 
Died between 6pm and 7pm today with regular alk. AA batts. So thats what, about 30 hours total run time and a good 20 hours of useable light.

From what I've read the SMJ is basically equally bright but has about 150% the runtime of the MJLED(2).
 
Buck268 said:
Died between 6pm and 7pm today with regular alk. AA batts. So thats what, about 30 hours total run time and a good 20 hours of useable light.
From what I've read the SMJ is basically equally bright but has about 150% the runtime of the MJLED(2).
Click to expand...

About 30hours sounds about right for plain alkalines for a MJLED.

I don't think the sMJLED (super MJLED) has any significantly better runtime than the gen 2 MJLED.....

This is what I got from my review

super MJLED drop-in for MiniMag 2AA (link)

current draw readings using 10A scale -

Duracell set open-circuit = 3.03V
PairDeer set open-circuit = 3.06V

Super MJLED
D = 0.03A or 25.7mA on 200mA scale
P = 0.03A or 22.7mA on 200mA scale

gen2 MJLED (my #2)
D = 0.03A or 26.3mA on 200mA scale
P = 0.04A or 27.5mA on 200mA scale

--
Vincent
http://clik.to/UnknownVT2007
http://clik.to/UnknownVT2006
http://clik.to/UnknownVT2005
http://clik.to/UnknownVT2004
http://clik.to/UnknownVincent
 
Nope! It's brighter. About 20% brighter and longer runtime. It's also unfortunately Binned a bit 'colder' than the select MJLEDs. All my Keymates have had thier MJLEDs upgraded to the 'Super'.
Buck268 said:
Died between 6pm and 7pm today with regular alk. AA batts. So thats what, about 30 hours total run time and a good 20 hours of useable light.

From what I've read the SMJ is basically equally bright but has about 150% the runtime of the MJLED(2).
Click to expand...
 
Moodino said:
Nope! It's brighter. About 20% brighter and longer runtime. It's also unfortunately Binned a bit 'colder' than the select MJLEDs.
Click to expand...

The Super MJLED's are definitely significantly brighter than the original (gen1) MJLED -
the gen2 MJLED's were quite a step up from the original.

I could not see much if any any difference in brightness of the Super MJLED over the gen2 MJLED's

superMJLED vs. gen2 MJLED (my #2) (link)
sMJLED_2.jpg
sMJLED_2U2.jpg

The brightness seem about the same - if anything the gen2 might be very slightly brighter - and it's on good but used AA alkalines and the Super MJLED is on fresh alkalines.

Ref: super MJLED drop-in for MiniMag 2AA (link)

--
Vincent
http://clik.to/UnknownVT2007
http://clik.to/UnknownVT2006
http://clik.to/UnknownVT2005
http://clik.to/UnknownVT2004
http://clik.to/UnknownVincent
 
Yeah, I've seen that comparision on CPF. But looking at those pics and comparing to my beam makes me think mine is actually an SMJ. Its the Arcmania MJLED drop-in sandwich.

But it could just be color descripencies on my monitor (laptop)...
 
With all due respect to you Vincent, and those are fine beamshots my friend- allow me to counter with my own comparison of the three gens of MJLED as profferred to me by Kevin Fritz of Lambda fame >
http://www.imagometrics.com/FLReviews/FL_Stuff.htm
As we all know, the term 'brightness' is vague. In the case of the SMJLED it seems to be the combination of the blue-er hue and slightly bigger hotspot combine to make the whole beam seem brighter. I still prefer the Gen2 version my self. BTW, I've never seen the MM drop ins- mine are all MODs to the Keymate or bare emitters that I drop into MM's ;)
 
Moodino said:
With all due respect to you Vincent, and those are fine beamshots my friend- allow me to counter with my own comparison of the three gens of MJLED as profferred to me by Kevin Fritz of Lambda fame >
http://www.imagometrics.com/FLReviews/FL_Stuff.htm
As we all know, the term 'brightness' is vague. In the case of the SMJLED it seems to be the combination of the blue-er hue and slightly bigger hotspot combine to make the whole beam seem brighter. I still prefer the Gen2 version my self. BTW, I've never seen the MM drop ins- mine are all MODs to the Keymate or bare emitters that I drop into MM's ;)
Click to expand...

The battery test was of the 2AA MiniMag -
my review and actual side-by-side beamshots (not composites or separate beamshots) are of 2AA MiniMag.

I do not have a Streamlight Key-Mate -
but if they use as stock 4x LR44 button cell alkalines
this amounts to a total in series of 6V
(vs. the 3V of 2AA alkalines - as per this thread)
- there may be a possiblity of overdriving the sMJLED, unless the series current limiting resistor is carefully selected.

There have been a lot a discussion of super MJLED's shortened lifespan due to overdriving with >3.0V
(however, I do note from your enthusiasm - you probably have not had any problems)

--
Vincent
http://clik.to/UnknownVT2007
http://clik.to/UnknownVT2006
http://clik.to/UnknownVT2005
http://clik.to/UnknownVT2004
http://clik.to/UnknownVincent
 
You must log in or register to reply here.
Back
Top