The voltage drops so rapidly during high output that the cell sort of pseudo regulates the temperature.
With regards to youtube videos, I'd be happy to include the ITP XP-E in my next 10440 demo vid.
hi patriot, i know your vids ( preon 10440, .. ), very helpful and definitive contributions. if i had a camera i'd probably do similar relevant statements in videographic format ( 10440 test runs, drop tests, flashlight comparisons, time elapse videos, poofing drivers, and other user-created tests and verifications ) and not the usual useless and time-wasting youtube **** like "
Look this is what i got yesterday in the mail a brand new Preon 2, and today in this video i am going to review the light (by reading off the specs and website info and demonstrating how one operates the modes)"-reviews.
**** that!!
so i am one of those who really appreciate your efforts and videos because yours are
real contributions to the world with
new info and insight (e.g. for the purpose of our wisdom, experience and records). so thanks a million for them.
As i had mentioned earlier, the FENIX has a *really bada$$* current draw, and one doesnt get much more than 30secs of burn time (R4 edition) because of the steep voltage sag under load. 30secs easily fit on a youtube clip.
The ITP has a less steep voltage sag and one gets more (effective) capacity out of the cell. Runtime is between 3-5mins and 15mins, depending on how you extract the heat (or on how cold the whole system
incl cell is).
Cell temperature has a considerable effect on the discharge behavior (runtime), and you get higher runtimes (approaching 15mins) when the ITP is cooled minimally only. You probably do *not* own Protected 10440's (i do own them and love them), just my guess!, but they would allow to demonstrate a cell's burn time for the full length of your video. If your video was 15min in length, you could demonstrate how long the runtime of the (Protected) 10440 is in the ITP (since it's less than that).
A great way to control system temperature is by wrapping the torch with a wet washcloth, or immersing the head only (bezel down) in cold water. That's how i get the 15mins without damaging the LED. The ITP is water-resistant. If you fully immerse the ITP in ice-water (water mixed with ice, at 0°Celsius), you get merely 3min of runtime before the protection kicks in. Then your video would be shorter
i dont want to hijack this thread and i've given already too much unasked info, so within 24hrs i will delete most of this post :sick2: except for the thanks to patriot :wave: