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Quote: Originally posted by Ewen c on 30/4/2017

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I got these with an external charger.

https://www.amazon.co.uk/gp/product/B0197XSPCK/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I have had no problems whatsoever.

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Quote: Originally posted by Francais on 30/4/2017

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No the 18650 Lithium ion cell is around 25% larger than a AA (aka LR6) cell, also the voltage of the 18650 is just slightly more than double that of the AA at 3.6v.

No doubt as time moves on, the 18650 will become the new AA, although the new kid on the block is the 2170 Lithium ion cell that Tesla are churning out in there millions at the new Gigafactory.

The 2170 is around double the size of the AA, so larger again than the 18650.

The 2170 offers higher energy density than the 18650, but also at a lower cost to the tune of 30%.

I am predicting that the 2170 cell will take over the world, and will remain in that position for at least 20 years.

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Quote: Originally posted by Ewen c on 30/4/2017

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You need a button top for your Cree. As you said the flat tops are for vaping.

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Quote: Originally posted by Bernie47 on 30/4/2017

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The original 18650's were, and I think still are, made by Ultrafire in China.
There are however a number of Chinese companies making cheap copies and selling them on Amazon Marketplace, these are the dangerous ones.

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