Mugrunty
Newly Enlightened
- Joined
- Feb 12, 2007
- Messages
- 163
Hey Guys,
Unbelievably quick post here, but I just did a battery current measurement of my newly obtained Quark Pro QP2L-X Cool tinted flashlight. I can give more detail when I'm not supposed to be working (ha!).
I measured the battery current using a current probe amplifier and an oscilloscope. The first screenshot is the current with the supplied 7777's CR123 primaries on MAX brightness. I was trying to get a relative idea on drive current. I read that the QP2L-X drives the LED harder during the first 3-4 minutes of operation...this would be the current during that time interval.
Now, just for kicks I used my old single AA quark tube with a 14500 li-ion (close to fully charged...to be exact it was in the CV phase drawing 0.3A) and the QP2L-X head. I measured the battery current again. You can see the screenshot below:
My first impression was: "Holy crap my 14500 cell is going to have a heart attack and die with that drive current!".
For even more kicks, I measured my Quark-AA XP-G with the same 14500 cell on maximum brightness. You can see this screenshot below:
So yup, looks like the QP2L-X definitely drives the LED a bit harder than the XP-G version. Most of you here probably already knew that, but I've been out of the four sevens loop for a little while. I'd like to try and measure battery voltage at the same time later.
Any thoughts? Or is this old news?
I must return to actual work!
Unbelievably quick post here, but I just did a battery current measurement of my newly obtained Quark Pro QP2L-X Cool tinted flashlight. I can give more detail when I'm not supposed to be working (ha!).
I measured the battery current using a current probe amplifier and an oscilloscope. The first screenshot is the current with the supplied 7777's CR123 primaries on MAX brightness. I was trying to get a relative idea on drive current. I read that the QP2L-X drives the LED harder during the first 3-4 minutes of operation...this would be the current during that time interval.
Now, just for kicks I used my old single AA quark tube with a 14500 li-ion (close to fully charged...to be exact it was in the CV phase drawing 0.3A) and the QP2L-X head. I measured the battery current again. You can see the screenshot below:
My first impression was: "Holy crap my 14500 cell is going to have a heart attack and die with that drive current!".
For even more kicks, I measured my Quark-AA XP-G with the same 14500 cell on maximum brightness. You can see this screenshot below:
So yup, looks like the QP2L-X definitely drives the LED a bit harder than the XP-G version. Most of you here probably already knew that, but I've been out of the four sevens loop for a little while. I'd like to try and measure battery voltage at the same time later.
Any thoughts? Or is this old news?
I must return to actual work!
