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Old 01-07-2011, 07:24 PM #1
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Default DX 3600mah 18650

DealExtreme: $13.60 UltraFire BRC 18650 3.7V 3600mAh Lithium Batteries - Yellow (2-Battery Pack)

I wonder what capacity these will really have.



**EDIT**

Looking at some similar ones HERE. These ones say printed capacity is 3600mah but the real capacity is 1000mah lol. Ill stick with my AW and sanyo batteries.


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Old 01-07-2011, 07:28 PM #2
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Default Re: DX 3600mah 18650

Not 3600mah, that's for sure.
Maybe 2000~2200mah if you're lucky.
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Old 01-07-2011, 09:26 PM #3
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Default Re: DX 3600mah 18650

Another buyer (ichoderso) reports on DX:

Quote:
Hi, and please, dont buy it.....

i bought a pair from another dealer, measured with one Amp discharge current from 4,2 to 3,0V ..... the first was around 120mAh, the second around 90mAh....
Very Poor Performance . . . BUYER BEWARE

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Old 01-07-2011, 09:40 PM #4
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Default Re: DX 3600mah 18650

I have seen a lot of questions about the accuracy of some of the stated capacities on these batteries. Based on size and composition there has to be a maximum possible capacity.

Anybody know the math on that?
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Old 01-08-2011, 10:35 PM #5
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Default Re: DX 3600mah 18650

Buy OEM cells: you will know what you are getting. A good OEM standard Lithium Cobalt cell has 2200-2400mAh, higher end Lithium Cobalt cells can have closer to 2600mAh capacities. Bigger companies even have the ability to change the electrode materials and get capacities close to 3000mAh.

I've got some old 2200mAh sanyo cells, they were harvested from a used laptop battery pack a few years ago. Not expecting much, I kept 'em just as some backups, but they still outperform the trustfire cell and ultrafire cell I have. (btw, anybody understand the reasoning behind naming your lithium ion battery company ____Fire? I mean, Come on!)

Poke around and you'll find some people here who sell good cells =)
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Old 01-08-2011, 10:41 PM #6
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Default Re: DX 3600mah 18650

Quote:
Originally Posted by BShanahan14rulz View Post
Buy OEM cells: you will know what you are getting. A good OEM standard Lithium Cobalt cell has 2200-2400mAh, higher end Lithium Cobalt cells can have closer to 2600mAh capacities. Bigger companies even have the ability to change the electrode materials and get capacities close to 3000mAh.

I've got some old 2200mAh sanyo cells, they were harvested from a used laptop battery pack a few years ago. Not expecting much, I kept 'em just as some backups, but they still outperform the trustfire cell and ultrafire cell I have. (btw, anybody understand the reasoning behind naming your lithium ion battery company ____Fire? I mean, Come on!)

Poke around and you'll find some people here who sell good cells =)
I feel this has to do with SureFire being such a legendary name, and companies playing off of the *fire part. Doesn't bother me as long as their products work. Though I know my SureFire CR123 cells are awesome and last forever in my 6P.
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Old 01-14-2011, 04:41 PM #7
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Default Re: DX 3600mah 18650

Yeah would say when it comes to dx just disregard the rated capacity.
Look toward the bottom in the comments and see if anybody has test the capacity. If they have go by that, if not just don't buy them.
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