I have other ultrafire 17670 batteries. These seem a bit slimmer where the protection circuit is installed. This allows these batteries to fit easily in a Surefire G2 and Surefire 6P whereas the the older ones I have are either tight fit or unable to fit. I have a couple of other lights that I have never been able to get a full size lithium ion battery to fit and these fit quite well. Thanks

I bought this battery to run in my elzetta flashlight. I use my elzetta flashlight around the house alot and got tired of going through cr123 batteries. A 18650 won't fit so I bought this one. The charge holds okay and is okay for use around the house.

This will be ideal for your compact LED light that can't use an 18650 but your runtime will be less... still beats the RCR123A's though.

This thing is great, I run them in my P60/G2x/Fury/NCP12/M18 striker,and they are perfect. I have been running them for almost 3 month with many cycles. Don't hesitate to save tons of loot.

I purchased 2 of these 17670\'s a few months ago for my eagletac p20c2 mkII and they have worked very well. When they eventually die i will not hesitate to buy another pair from this site. My only complaint is that one of the batteries had trouble fitting into my flashlight because the plastic cover was a bit too thick in certain areas, but i quickly solved the problem by fileing down the thick areas with a nail file. 5 out of 5 for delivering good quality and reliability for a fair price.