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Sanyo UR18650FK Cell Specifications
#1
Warning: The information in this thread was obtained from various sources on the Internet, including any datasheets linked below, and is provided for reference only. It is not guaranteed to be accurate. To prevent fire or personal injury, never charge or discharge a cell before verifying the information yourself using the original specifications sheet provided by the manufacturer.

Brand:Sanyo
Model:UR18650FK
Capacity:2100mAh Rated
Voltage:3.70V Nominal
Charging:4.20V Maximum
2100mA Standard
--- mA Maximum
Discharging:2.50V Cutoff
420mA Standard
--- mA Maximum
Description:Red Cell Wrapper
Teal Insulator Ring
18650 Form Factor

Data References:
http://www.houseofbatteries.com/documents/UR18650F.pdf

Pictures:
Fully-Tested 2001-2200mAh Cells, $1.35 each!
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#2
These tend to get hot during charging and discharging
Spec says ambient up to 40C/104F charge and 60C/140C discharge
I think I have the same batteries with the markings are: LESFK15 096604
                                 ''~``
                                ( o o )
+--------------------------.oooO--(_)--Oooo.-----------------------------+
|                                                                        |
|   Howie Grapek                        South Florida, USA               |
|   cell: 303.818.9414                  email: howiegrapek@yahoo.com     |
|   phone: 561-819-9988                 http://www.howieshomestead.com   |
|                            .oooO                                       |
|                            (   )   Oooo.                               |
+-----------------------------\ (----(   )-------------------------------+
                               \_)    ) /
                                     (_/

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#3
(10-12-2017, 04:04 AM)howiegrapek Wrote: These tend to get hot during charging and discharging
Spec says ambient up to 40C/104F charge and 60C/140C discharge
I think I have the same batteries with the markings are: LESFK15 096604

Have pulled the same cells from a dell pack with "KH8FK37" on the cells and the same "C" on the upper part of the cells.
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#4


I found six of these in a Dell pack, rated at 4700mAh. No markings on the cell, apart from the date, J53A. The wrapper in dark mate red, with teal - greenish ring.
It comes out at 2350 mAh per cell, so probably a 2400. Sanyo is strange.
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#5

 

I pulled these Sanyo from some Demil Military Computers and you can faintly see that it has FK in the numbering, you can make out the "D". Haven't tested capacity yet but the pack is rated 3ICR19/66 11.1v, 2.4 Ah. The ring is more a Green than Teal but seems to be the same as this ones stats.

EDIT: These are actually 18650F, not FK, I found the manufacturers labeling after separating them.
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