Battery Question...

[Squall409]

Sorry massive noob question here. Are 18490 and 18500 batteries the same thing?

 

[EddardinWinter]

Sorry massive noob question here. Are 18490 and 18500 batteries the same thing?

They are not.

 

[ncvapfan]

Close but no.
The fist 2 numbers are the diameter of the battery. The second 2 are the length.
The 0 at the end means it is a tube

 

[beckdg]

they're measurements.

the 18 denotes the diameter in mm.

the 49 and the 50 denote the length in mm.

so close in size, they're often interchangeable.

 

[EddardinWinter]

The way the battery is named is by the size.

So a 18490 is 18mm x 49mm long

A 18500 is 18mm X 50mm long. It is basically the same size battery, just sold by different company. Aw brand uses the name 18490 and EH, Efest uses 18500.

I use both 490's and 500's in my provari. The button top 490 and 500 are the same size.

Same thing goes for 18650, the 18650 is 18mm X 65mm.

Although, most protected 18650's will be a little longer than 65mm because of the protection circuit.

Here is a bit more data...from here:

http://www.e-cigarette-forum.com/forum/general-e-smoking-discussion/469702-18490-v-18500-a.html

 

[erikbal]

Close but no.
The fist 2 numbers are the diameter of the battery. The second 2 are the length.
The 0 at the end means it is a tube

Wow I did not know this. I guess you learn something new every day! I know what a 44re transmission is compared to a 42re, but don't know much about batteries!

Sent from my DROID4 using Tapatalk

 

[Squall409]

I'm just asking cause I see on a number of sites 18490/18500 batteries. So I wasn't sure of they were the same size or if they were just close enough in size to be interchangeable.

 

[retired1]

Moved to Batteries and Chargers

 

[Baditude]

I'm just asking cause I see on a number of sites 18490/18500 batteries. So I wasn't sure of they were the same size or if they were just close enough in size to be interchangeable.

Generally speaking, they are interchangeable. What's important is to get the right chemistry that you are looking for.

Protected ICR (Li-Ion) batteries will be longer (18500) due to the added protected circuit on the positive end of the battery.

IMR (Li-Mn) batteries will be shorter (18490) because being a safer chemistry they do not require the protected circuit that ICR batteries require. IMR batteries are also called "un-protected", but most importantly they are also "high drain". These are the batteries you want to use in regulated (variable voltage) mods, mechanical mods which use a Kick, or when using a Rebuildable Atomizer.

The most popular 18490 battery is the AW 18490 IMR 1100 mAh.

Deeper Understanding of Mod Batteries