I've been using these batteries for over a year now in my Surefire P2X Fury, with very good results.
They have almost exactly the same run time as the two disposable CR123A batteries normally used in this light.
Seeking a rechargeable solution, I used the K2 Energy Lithium-Phosphate batteries that are the only rechargeables Surefire warrants for use in their CR123A flashlights, getting 45% of the run time from those vis-a-vis the disposables.
Another thing that finally made me dump the K2 Energy batteries altogether was that the negative terminals would eventually cave in over only a month or two to the point that the batteries became unusable.
This second problem was a total deal breaker.
I ordered these, and now I'm a happy camper.
I get slightly more run time (about ten minutes) with these AW17670P batteries than with the disposables.
More importantly, the negative terminals on the AW batteries are extremely rigid, so I know I'll be able to use them for the hundreds of charge/discharge cycles they are designed to yield.
One small comment I would make is that they are a very snug fit in my Surefire P2X Fury, meaning I need to give them a gentle nudge to slide in all the way, then tap the back end of the light gently after unscrewing the tailcap to get the battery all the way out.
If the AW batteries were even slightly bigger, they wouldn't fit at all, but there is no evidence of damage to the tough vinyl wrap or label after I've used them, recharged, then used them again dozens of times.
I also have a Surefire 6PLED Defender that also ordinarily takes two CR123s, and these batteries slide right in and out with no resistance at all, so not all Surefire CR123 battery flashlights have the exact same internal diameter.
Reviewed by: oldpink from Indiana.