surefire G2 problem?

[rockz4532]

I have a surefire g2 from 6 months ago that suddenly stopped working. I replaced the batterys and it worked fine, but what i dont get is that the batterys that i took out were 5.75 volts together. so does the light stop working at 5.75v
While the batterys are at 5.75 volts, i dont even see a dim glow from the bulb, its just completely dead, but when i go .25 volts higher, its at full brightness. I dont think the g2 has regulation, so whats up with it?

 

[nzgunnie]

The batteries are not supplying 5.75v to the lamp.

The lamp is trying to draw over 1 amp from those cells. At that current draw the voltage supplied will be much lower, especially from depleted cells.

As the current increases the cells ability to supply the required voltage drops. 1 amp is quite a bit of current.

 

[Ringer]

I have a couple G2s that I have had for years. I can't recall either of them ever dimming. They work fine then one time you go to turn on and nothing. I will say that I don't use them for long periods of time at once. If I did I suspect my experience may be a little different.

Now I also have a couple Streamlight Twin Tasks that I have seen the Xenon bulb start to yellow a bit before it quits working. With the Twin Task the LEDs will continue to work while the xenon won't light.

 

[rockz4532]

hmm that may be the case, but one morning i use it, then next morning, no light!, im using the depleted cells in one of my inovas now, i notice after a couple seconds it dims.
That would make a really unrelyable light, if one day it works and one day it doesnt. and i dont even think i used the light for one hour, maybe 30 mins.

 

[Bullzeyebill]

Surefire LA's require quite a bit of current to turn on, but one warmed up current demands drop off quite a bit and it can run for awhile even when batteries are getting low. Once you turn the light off with fairly depleated batteries, the batteries may not supply that extra current to get the light turned on. Sort of a simple explanation.

Bill

 

[nzgunnie]

hmm that may be the case, but one morning i use it, then next morning, no light!, im using the depleted cells in one of my inovas now, i notice after a couple seconds it dims.
That would make a really unrelyable light, if one day it works and one day it doesnt. and i dont even think i used the light for one hour, maybe 30 mins.

Remember the Inova will be drawing only a small amount of the current that the P60 will.

 

[Bullzeyebill]

I have several P60 LA's that are unused. The reason being that I do not consider the CR123 driven Surefire 6P lights EDC's, and I do not think they were developed to be every day carry lights, but single purpose lights for situations that demand fairly high output, and when the situation is over, fresh CR123's are installed for the next need. The only way to insure that your SF incan is going to light up is to have fresh batteries installed. SF must have realized this when they went to the E series incan lights that did not draw as much current as the larger C series, and batteries would last longer. The next step that SF took was going to LED lights in the E and C series series formats, flashlights that are better geared to EDC use for the general public. The next step for me after using 6P's and 9P's with CR123's was going to Li-Ion cells to run my hungry SF incans, and I never looked back.

Bill