Several Questions

LED Flashlights – General Info
1

These questions all pertain to the Crelant 7g5 v2 with 2 2600ma tenergy protected 18650’s, driven at 3a on an xml.

*#1- *I’ve noticed it gets pretty hot on high. So I decided to do a test. I left the light on high until it would turn off from the heat basically. It lasted 13 minutes on top of a wooden table in my 69 degree condo. When I say lasted, I mean, it turned off on it’s own. After it turned off, I touched the light, and since it wasn’t extremely hot, just pretty hot, I held onto it for a minute. So obviously, it wasn’t burning hot. I was just wondering, is this normal? (Xml at 3a for 13 to turn off from the heat) I’d say that this light was as probably between 100-150 degrees.
#2-one battery does PCB After the light overheats, which I’ve made happen multiple times on purpose, the light won’t turn on. Even if I wait for like 5 minutes and then reinsert the batteries the same order. So, next I put each battery in the light in single 18650 setup. Only one ever works. The other one won’t work until I put it into the charger for 5 seconds. I don’t know what I’m talking about, only I thought it might be something with the PCB going off. The battery that doesn’t work is always the one closest to the led in order. Anyone know why this happens? I have problems with that one battery in other situations too. I think that getting a replacement might fix this.
#3- Also, the reflector on this is a smooth 2 1/4ish inch reflector. And I don’t notice this from 30 plus feet, but heres what happens in he beam. Even when I shine it at the wall from like 2 feet away, the beam has a hotspot, but then has two less intense interlocking ovals going through the center around 3 the diameter of the hotspot, and then there’s a couple rings off different brightness, but they are small and I assumed they came with having a smooth reflector. Are these ovals normal?

If that pic doesn’t work, just go here http://postimage.org/image/he148vjuh/

Thanks in advance for just reading this and trying to think of a reason for these! Even more for a reason!

2

Ok, I'll do the best I can with these questions.

1. From what you described in question 2 I am guessing what is happening is after 13 minutes the protection circuit in one of the cells trips which cuts off power to the driver. But, yes it is perfectly normal for an XM-L to heat up if ran on high for any length of time. That is why there is a medium mode.

2. What you are describing is the protection circuit tripping. My personal guess is that the heat from the light is causing the protection to trip. However, it may also be that one of them has a lower over current protection point.

3. What you described in the picture is most likely because of light reflecting off of the area right below the led but I am not quite sure. However, the outer rings are to be expected with a smooth reflector.

Hope that helps. :)

3

Thanks for the great help dude, really cleared some things up! :slight_smile:

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3. Yup, that starry or “floral” effect is normal, don’t worry :wink: (depending on reflector, it will be more or less visible)

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Oh good, nothing wrong with the light then I guess.