17670 Batteries

[Dan0s]

I bought a ultrafire 3.7v rapid charger off ebay a week or 2 ago with some batteries, which i thought were going to be 17670's but it ends up they are 18650's. I never realised how fat these batteries are!
What i want to do is use 17670 batteries to run on my L4, but before i fork out some coin for them are they the same size as 18650's or are they quite a bit skinnier? If they are slightly skinnier than the 18650 im quite confident that they will fit.
So are they skinnier? If they are the same size i guess its back to spending loads of money on batteries!

 

[LEDite]

Danos0012;

The first 2 numbers are the diameter in MM.

#18650 are 18 mm.

#17670 are 17 mm.

Larry

 

[Dan0s]

Great thanks for that, i measured the width of the barrel of the L4 and all up it was about 18mm so i think the 17670 should fit but might be a little bit tight!
Thanks again!

 

[matrixshaman]

I run a 17670 in my SF L4 - fits fine.

 

[scott.cr]

A CPFer once brought me an L4 for boring to fit a 17670 because it wouldn't fit. There was a little "lump" inside the tube of the L4 and getting the 17670 in there would have meant forcing it in.

A CR123 is a 16mm diameter cell, so a 17670 "might" or "might not" fit depending on the tolerance range of your light and the tolerance range of your cell.

Only one way to find out!

 

[labrat]

17670 cells are slimmer than 18650 cells!
But bear in mind there is also a difference between different brands of cells, and protected versus non-protected!
My L4-body measures inside the tube 17.25 mm, no lumps in the tube:



Takes these 17670 cells just about,no machining needed, but must be shaken to let the cells out!
Or you can get a body from another maker, like this 18650 body from Mirage_Man, it measures 18.95 mm inside the tube, should be able to take yet more upgraded cells in the future:

 

[pigolotoscani]

Good day, I have a one question. Can I use this 17670 battery in my flashlight?

[IMG=http://img833.imageshack.us/img833/6661/22653319.jpg][/IMG]

[IMG=http://img191.imageshack.us/img191/1253/83099436.jpg][/IMG]

I strip this battery, because my flashlight measure 17mm inside the tube, and battery with protection coating measure 16,9mm.
Sorry for my poor English
Thanks

 

[labrat]

You cannot use the battery stripped of it's protective cover/film!
You will not be able to turn the light off with the battery inside, as the side of the battery is the negative connector of the battery.
But I guess you have found this out already?

 

[Jackasper]

Pigolotoscani, depending on the flashlight and it's input voltage, you might be better off using cr123's as they typically measure 16mm x 34mm. Just take note that 2 of those will put you at 6v where the 17670 will only be at 4.2v (I'm assuming it to be Li-Ion). Labrat has a good point, stripping a battery is not a good idea. Another option, (again this is provided the light can handle the higher voltage) is getting some 16340 lithium rechargeables or some safer, lower voltage LiFePO4 cells with the same (16340) measurements, and should fit nicely into your flashlight.