Are these NCR18650B batteries legit?

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Wildcat
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Do you REALLY need a protected battery?

Barkuti
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Ohm711WalkIntoTheLight and klrman, let me solve your doubts:

 

 

Fake cells, probably from Chang Jiang FST OEM. Related odyssey thread: Seems like I got a six-pack of counterfeit/fake Samsung ICR18650-30B cells :-/

 

Cheers 

Barkuti
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klrman, removing the protection circuit, button top cap and associated transparent wrap allows checking the original cell top, this would give ultimate clue to solve your doubts. Seems whoever installed the protection PCB assembly did a somewhat botchily job, just that.

 

Cheers Party

Barkuti
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klrman wrote:

Barkuti is this enough to tell?  I removed the transparent wrap and protection circuit, but not sure how to remove the button top cap.

 

That is the last step for you to overcome. These buttons are spot welded over the cells' ones, fundamentally to mask and protect the protection circuit power feeding wire you removed. 

 

Cheers Party

P.S.: a tiny flat head screwdriver may help.

klrman
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Thanks.  I'll have to think about that last step as I would be applying a lot of pressure on the actual cell to try and remove those caps.  Last thing I need is this battery going bang in my house!

Barkuti
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klrman, use combination/lineman pliers to grab the stuff and rotate it. You should find a flimsy nickel tab spot welded underneath.

 

Cheers Smile

Barkuti
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You went too far with the close-up klrman. A bit more angled perspective and much better illumination helps too.

This picture is from HKJ's review of the NCR18650B:

 

 

Yours looks genuine, at least as far as I can tell with such image.

 

Cheers Smile

P.S.: now just file the nickel tab remnants from the top with a grinding bit equipped rotary tool and you're done.

klrman
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Based on your image above, mine looks exactly the same, so not a fake then.   Thanks for all your help in this Barkuti 

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