Solar Force CREE Q5 5 modes head installed to Surefire G2

garfieldso

Newly Enlightened
Joined
Oct 30, 2007
Messages
48
Just brought a Solar Force CREE Q5, 5 mode inter head said to be also fitted for Surefire 6P or 9P; it cost is about US$22. And I have worked out to fit it in my Surefire G2 to replace the P60 lamp.

At first trial, the outer G2 head could not be screwed in. And I found that the outer spring was bigger than the original P60.
IMG_2887.jpg


After removed the outer spring, the G2 head could be screwed in but not tightly fitted with a gap of 1~2mm. After some trials I found that the inter reflector and the CREE Q5 housing could be adjusted the length by screwing in and out as to fit for the G2 head.
IMG_2881.jpg


It had a plastic ring at the reflector to avoid the short circuit of CREE.
IMG_2886.jpg


Here is the CREE Q5
IMG_2885.jpg


Here is the assembly of Surefire with CREE Q5
IMG_2880.jpg


The most disappoint is that the CREE Q5 5 modes head hasn't the memory, thus the 5 different modes High, mid, low, strobe and SOS will be cycling for each switching on and off. Therefore the tactic tail switch of G2 becomes useless, because every press of the tactic switch is changing to another mode.

Used 2 x 3.7V 800mA protected Li-ion cells and ran the stress test at high level. It lasted for around 40~min before the batteries cut off.

The Power consumption after switched on 5 minutes:
2 x 3.7V protected
High - 970mA (770mA when freshly lites on at cool)


2 x 3.0V 123a
High - 800mA
Mid - 330mA
Low - 71mA

1 x 3.7V protected
High - 350mA (It means that without the high mode)
Mid - 350mA
Low 93mA

1 x 3.0V 123a

High - 45mA (It means that without the high & Mid mode)
Mid - 45mA (It means that without the high & Mid mode)
Low 45mA

Brightness compares vs Jet-II Q5 (3V123a). Photos taken at ISO200 @ 1/4 Sec.
Jet-II 1 x 3V - high
Jet-II_1-4.jpg


Q5 Mod Surefire G2 2 x 3V - high
2x3V_1-4.jpg


Q5 Mod Surefire G2 2 x 3.7V protected - high
2x37_1-4.jpg
 
I've got two of those Solarforce drop ins. I've found that if you cut the big spring to provide you with almost and entire circle (359 degrees around), you can snap it onto the exposed threads of the brass portion. This ring gives just enough space to allow the head almost completely screw down. It leaves just a tiny gap.
 
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