I've been using CR123's, or just 123's as I believe they are also called. They are 3.0v.
So I've heard of 16340's before, but never looked into it. Then tonight I was looking at the Sunwayman V10R Ti+ LED flashlight, and it is supposedly capable of 190 lumens with "normal" battery configuration, and 500 lumens with a 16340 battery.
So I am already at batteryjunction, so I go over to the battery sales area of their site and look up Lithium batteries. I found the 16340, RCR123A section and looked into if for answers. What I found were not many choices. There are: 3.0v RCR123A's, 3.2v RCR123A's, and 3.6v 16340's. To make matters more confusing, the only option which is listed as a 16340, is also listed as a CR123a. It says : Ultrafire 3.6v 880mah RCR123A, CR123A 16340 CR16340 as low as $3.25
Now I know the standard non rechargeable 123's are also called CR123A's, and CR123's.
I read that some 16340's might be 1-2-6 millimeters longer than a CR123, so they might not fit on some 123 lights, unless the light is made for it.
Why do 16340's have the same names as CR123A's, if they are different in several ways? They apparently are 3.6v and can be longer.
Is it me, or is that confusing?
How does replacing a 3.0v 123 battery into a flashlight with a 3.6v 16340 cause the power to jump from 190 to 500 lumens?
Whats with the 1 listed Tenergy 30200 battery, a CR123A, being 3.2v? Is it possible to accidentally buy the wrong battery with too much voltage and damage your gadget because it's not made for 3.2 or 3.6v?
In your lights that can use either 123's, CR123A's or 16340's, which battery do you choose to use on a regular basis, and do the different choices have an effect on battery life, if one is 3v, 3.2v or 3.6v?