Jet-1 MK I.B.S. heat sink questions

[divine]

It's a small light, I think the Jet I puts more current to the LED, making more heat... and it's a smaller light. So, more heat to smaller aluminum makes the light hotter.

I ran my Jet I MK IBS the other day for 5 minutes on max cause someone said their battery was dying after 5 minutes and the thing was really hot after 5 minutes.

 

[aerolight]

thanx divine. good points. I had assumed they were drawing similar current, but on second thought if the jet 1 is drawing even a little more current to the Q5 than the P3D that could splain alot.

the size difference....ok maybe a little influence in what I am seeing: aluminum is a great heat conductor, but the heat I am referring to on both is localized near the head...

 

[Nake]

My P3D on turbo draws .660A at the tail with 6V battery. My Jet I MK I.B.S draws 1.48A with a 4V battery.

 

[StarHalo]

I'm assuming you're using a 14500 cell - the IBS system has no problem running a 3C draw (discharging the battery three times faster than it was designed for) on li-ion cells, which can easily kill a battery in a matter of minutes. Generally speaking, you shouldn't run the light on max for longer than a few moments. If you need a usable high-output setting, shoot for 75-80% on the ramp and monitor the flashlight temp carefully; anything too hot to hold is going to damage the battery.

 

[aerolight]

Nake, great info, thanks! is that .660A draw a Q5 bin P3D?

StarHalo, yes its a 1450. Thanks for the comment, yes, this heat is from a setting that is too high, I see your point.

 

[Nake]

Nake, great info, thanks! is that .660A draw a Q5 bin P3D?

No, I should have stated it's a Q2. I don't presently own a Q5, but I've found that all P3D's circuits read pretty much the same. Using the same voltage battery, I would say the slight differences in readings are due to emitter Vf and the circuit's components manufacturing tolerances.

 

[aerolight]

I have a Jet-1 MK I.B.S that gets hot to the touch in a couple of minutes. This is so much faster than either of my P3D Q5's on "turbo" putting out similar lumens that I wonder:
1) if this is simply because the Jet has a better heat sink and heat conduction path to the flashlight body than Fenix, then there has to be a mighty hot LED isolated from the body down inside the Fenix P3D.
2) perhaps their is some electrical resistance other than the LED in this Jet. Maybe even a malfunction.

It is not a small difference. Any insight would be appreciated?