16650 Rechargeable Battery with Battery Charger, 16650 Protected 3.7V Rechargeable Battery 1800mAh (2 Pack) - [Replacement for 2 x CR123 ]

Great replacement for 2 CR123 batteries and will pay for themselves in no time.

Had it for a while no and it hasn’t blown up yet so I’d say it works.

Nice little setup. You get 2 batteries so you can rotate them and always have power. These will pay for them selves after about 3 recharges. hard to beat. I would definitely buy again.

I ran a capacity test on two-pack of these using a XTAR VC4 Plus:One tested 1580mAh, the other 1671mAh. 1671 is right in line with what you'd expect. 1580 is a bit short, but not egregiously so.The size is nice, and you can use these to replace cr123 batteries even in tight fits. I bought them for flashlights. On my old fenix pd30 it fits perfectly, and on my old iNova it was a tight fit, but it would still slide out. (the 1580mAh one slid in an out more easily, so I think it's a touch smaller.)Overall, I'm happy with my purchase, and I'd recommend these for anything where a 18650 is just a bit too large.

They worked right away!

I used these batteries in my Stream light Pro-tac 2L X, and the light flickers. It does not remain constant or at the correct output. I've also tried these batteries in my surefire G2x, and I've had the same results.These batteries are a good concept for replacements of (x2) stacked 123A's but they don't work well with high output flashlights. Wouldn't rely on them staying constantly on.

The batteries hold a good charge as advertised.Good product

Love the fact that I am no longer throwing away worn out batteries from my flashlights any more. Now I just charge it up and use it without any worries. Then after usage, if over an hour of light I just throw it back on the charger and I am ready for another night.