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Surefire G2X Tactical trouble

Discussion in 'Flashlights & Other Illumination Devices' started by Wolfhunt3r, Jan 11, 2018.

  1. Wolfhunt3r

    Wolfhunt3r Loaded Pockets

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    Hello!

    I needed a new light for work (law enforcement) and I've been looking at the Surefire G2X Tactical for some time so when it came up reduced prize on black friday last year I bought it.

    I love it's durability and simplicity but I've been having trouble with it not really performing that well, light wise. It's varies a lot in output and when it gets cold (as it do here in Sweden) it sometimes stops working all together. Just now an hour ago it died completely on me during a house-search and suddenly decided to work again when I got back to the car to get another light.

    I don't know much about batteries, so when looking at the ones I use I can read the following:

    "RCR123A lithium battery. Rechargeable. High-current performance" ...and then there are a lot of chinese text that I can't read.

    Starting to wonder if it's the batteries or something with the light itself.

    Any insight on the matter would be appreciated. Hopefully I am just using the wrong batteries or something. I got the batteries from a co-worker who said they would fit my light. The torch itself was delivered without batteries.

    I charge the batteries in an Nitecore Intellicharger that I bought locally.

    Kind regards,

    WH
     
  2. Adam Ng

    Adam Ng Loaded Pockets

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    Battery and cold temperature is not a good combination. When I was a photographer working in cold weather (thank god rarely), we keep battery pack under our clothes with a wire running to the equipments. You might look in to the same set up.


    Sent from my iPhone using Tapatalk
     
  3. Greenbean

    Greenbean Loaded Pockets

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    As another LEO, (former life) you need to run regular CR123s and see if it performs better.

    I’ve never had an issue with any of my Surefires. BUT I only use CR123s so I don’t have to worry about them when in storage in different vehicles and bags and gear.

    They are great lights, that said also be sure the rear edge of the body is clean before you install the tail cap.
     
    Wolfhunt3r likes this.
  4. Wolfhunt3r

    Wolfhunt3r Loaded Pockets

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    I will try to change the batteries into normal rechargeable CR123s then! Thank you for your reply.
     
  5. eugenechia1989

    eugenechia1989 Loaded Pockets

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    I read somewhere that the Surefire G2X isn't supposed to run with rechargeable batteries of the RCR123A or 16340 type due to the light's working voltage being somewhere around 6V or slightly more, so basically you can only use two 3V non-rechargeable CR123As (most rechargeables of CR123A size are 3.7V). Also, Surefire warranty is quite particular about only using US-made batteries. This is why I rarely use my G2X LE anymore. It has worked well thus far but I've since switched to lights that are purpose-built to run rechargeables. No idea if that's what's causing the problems you're experiencing, it's just a guess. I bought a Surefire because of their reputation for reliability and durability, I'd be very disappointed if they weren't any better than Chinese lights.
     
  6. thekapow

    thekapow EDC Junkie!!!!!

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    Sounds like a battery issue, I never had that kind of trouble with regular CR123 in surefires (In sweden).
     
  7. david57strat

    david57strat EDC Junkie!!!

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    I would, most definitely, not use any kind of rechargeable batteries, other than LiFePO4 (lithium phosphate), in your G2X. Those are the only rechargeable batteries that may be safe to use effectively in your G2X Tactical, albeit it at the risk of voiding the warranty.

    [​IMG]

    Here is a picture I just took (not my greatest picture, but hopefully it illustrates the point).

    I used to own several lights that were for use only with disposable (primary) CR123 lithium batteries (as pictured on the far left). I only bought Surefire CR123s, and that got very expensive, and very old, quickly; so I started to research a viable alternative, and I ended up trying out these Tenergy RCR123 LifePO batteries, instead.

    They worked fine in some lights and terribly in others (the low modes didn't work properly in some of my 1 and 2-CR123 Fenix lights. I ended up doing away with any lights that didn't support the use of these batteries, because I was finished with spending a fortune on overpriced disposable CR123s, forever.

    I now use lights that support 18650 batteries (and some of those support the use of 2 disposable CR123s, in a pinch; but i never use them), and have never looked back. I stopped buying primary C123 batteries, years ago. The one in the picture, on the far left, came with a light that I purchased back in 2015 lol.

    Some notes on the picture above:

    1. The XTAR CR123 (primary/disposable) is rated at 1400 mAh. I think that's fairly typical (Surefires may have been 1500 mAh. Not really sure). Those should work very well in your G2X, but will get extremely expensive to be constantly replacing, before you know it. These would typically read between 3.0 and 3.1 volts, or so. when new.
    2. The XTAR RCR123/16340 is a protected, lithium ion battery, rated at 600 mAh. Hot off the charger. they measure in at 4.2 volts. The resting voltage is said to be 3.8 volts. These are way too high in voltage to safely run in a light rated strictly for two disposable CR123s (6 volts, combined. Do not attempt to use these in your G2X, as you will be running the light at more like 7.4 volts - and as many as 8.4.
    3. The two batteries on the right are Tenergy LiFePO4 (lithium phosphate) batteries. They're also rechargeable, but are rated at 3.0 volts, but come off the charger at closer to 3.5, resting at approximately 3.2 volts. These actually work in some lights that usually only use disposable CR123s; but not in all. They are rated at 400 mAh, so run times would be greatly sacrificed, in a high use light.
    Rechargeable batteries like those above (assuming they even work, at all) don't always perform very well in really cold temperatures, and because of the far lower capacity, your run times will be greatly sacrificed, compared to using disposable CR123s.

    If you're going to use rechargeable batteries in a flashlight, I would strongly urge you to carry the light on your person (holstered, or in a pocket), rather than leaving it in the car, to avoid it being as negatively affected by the cold.

    I'm very surprised your G2X is still working, unless you're actually using LiFePO4 batteries in them. If you install typical lithium ion batteries in that light, fully charged, at some point, you will blow up the light. The electronics will be completely fried, and you will completely void the warranty.

    Any chance you could take some pictures of the batteries you're using?
     
    Last edited by david57strat, Yesterday at 3:54 PM
    #7 david57strat, Jan 18, 2018 at 10:40 PM
    Last edited: Jan 19, 2018 at 3:56 PM
  8. Dirty Rod

    Dirty Rod Loaded Pockets

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    I’ve used rechargeables in all my SureFire lights including G2X lights for a few years now. I know all RCR123s aren’t the same so I stuck with the Olight rechargeables (3.7v 650mAh) which I was already using and have had good performance. I did ask SureFire support once why they didn’t advise using RCR123s in their lights and why they stopped selling rechargeables and couldn’t get a rear answer so I figured I’d experiment.

    Admittedly, I haven’t used them anywhere colder than about 30 degrees.


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    #8 Dirty Rod, Jan 19, 2018 at 12:37 AM
    Last edited: Jan 19, 2018 at 12:43 AM