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These are essentially Panny NCR18650B
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#1 (permalink)      12/10/2015 7:46:01 AM US Central   quote/reply + tips
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Nymzavril
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These are essentially Panny NCR18650B
Spec sheet only differs by 0.2A in the rated maximum continuous discharge (these are 7A, previous NCRBs have been 6.8A), so there might be a small tweak to the composition. Spec sheet for the B is in the drop box, and until I can find an official Sanyo one for these, I suggest everyone considers them as essentially the same cell.
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#2 (permalink)      12/10/2015 11:44:49 AM US Central   quote/reply + tips
light_wolff
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+1 details
NCR BL is the same cell as NCR BF, but without PTC (safety current limiter), and with protruding positive pole (sort of "button top").

NCR BF is successor (replacement) of NCR B, slightly different chemistry, added SiO2 in electrode.

BL is better suited for "high" currents then B or BF. Less internal resistance, less heat, higher voltage.
NCR B is outdated.

Edited on 12/10/2015 at 11:46 AM. Reason:
#3 (permalink)      12/10/2015 11:46:33 AM US Central   quote/reply + tips
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Nymzavril
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Yep, I agree with all that. Thank you for the additional data.
Grand Poobah of The Sacred Order of The Magick Blue Screwdriver. The old Juice Junkies FAQ and guides can be found here: https://www.dropbox.com/sh/vp4ktp8l7fdywg5/AABFkmnUJhjl9vX8tE4URZ8sa?dl=0