Battery Sizes.....

[Doug]

Anyone have a list? Example: What is the name of the battery that is the size of 2 123's?

[Ra]

Sorry, I don't have a list...

But the popular 18650-cell comes real close to 2 123's..

TIP: Ask AW.. the battery seller on CPF !!

[x-ray]

This List from the CPF Wiki may help

[NelsonFlashlites]

Anyone have a list? Example: What is the name of the battery that is the size of 2 123's?

I want to say it's called a 223, but I'm not sure.

[Ra]

Didn't know about that list...

according to that list the 17680 and 17670 are 2xCR123 in size...


Never too old to learn...

Ra.

[Long John]

I don't know about the 123's. But for the others:

The first two numbers are the diameter, for example 18650=18 mm,
the next two are the lenght=65mm and the 0 for round.

So the 18650 should be a little bigger(1mm) than the 17670.

Best regards

____
Tom

[havand]

cr123a cells are actually something like 16340? I'm pretty sure. AW has it in his battery sale thread in the dealer's section if you REALLY want to know.

[SilverFox]

The 123A nomenclature indicates that it is 1 cell that is 2/3 the length of an A cell. A cells are around 50 mm in length and are 17 mm in diameter and are round. That means that a 123A cell should be similar to a 17340 ( I believe it actually works out to 33.33 mm in length). In theory, two of these would be a 17670.

Tom

[Doug]

Ok, great guys, so, 17650/17670 it sounds like... but what about the voltage, I assume it should be 2x3.7=7.2, right? Also, what chargers are capable of charging CR2's, 123's and theses 17650/17670's? Thanks!

[SilverFox]

Hello Doug,

The 17670 is the size of one Li-Ion battery. It will have a nominal voltage of 3.7 volts and be charged up to a maximum voltage of 4.2 volts. This single battery just happens to be the size of two CR123A cells in length.

Tom

[Doug]

Oh! So, you loose voltage, so, I am better off using 2 RCR123's, to get the higher voltage, eh? As long as they are protected, right? No issues with using 2 RCR123's, right? What about theses 900ma ones, any issues with them?

[SilverFox]

Hello Doug,

You have to determine if your light can handle higher voltages. Sometimes they burn out because they aren't designed to handle the higher voltages.

Keep in mind that 2 CR123A cells give you around 6+ volts, where as 2 R-CR123A cells come off the charger at 8+ volts.

For example, the SureFire L4, and perhaps the U2 as well, can not handle the extra voltage, however they work just fine on one cell.

Tom