Need some help to ID the Li-ion cell

Lockon

New member
Joined
Aug 28, 2019
Messages
7
Hi guys i am new to the Li-Ion thing and planning to build some stuff

I have recover some cell from an Dell WW16 type laptop back
Below are the laptop battery info:
Dell
Type:WW116
Capacity:56Wh
Rating:11.1V

The cells inside is layout in 3S2P

image_baiepo.jpgimage_xrywcb.jpgimage_ythxlr.jpg

image_suusuj.jpg

the cell are in red wrapper and with the printing below
C
MF1M4C9
129778

i tried to google and alibaba it for some info but none is found
i try the cell database also cant find it

anyone can give me some insight on how to search it or anyone got the specs of these cell?
 

Geek

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Joined
Aug 15, 2017
Messages
934
Please take photos. Wrapper and top colours help identify a cell.
 

thunderheart

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Apr 4, 2018
Messages
275
Lockon said:
the cell are in red wrapper

SANYO. Look at that red wrapper at different angles, there should be a marking embossed which is not so easy to see.

image_xivbai.jpg
 

Lockon

New member
Joined
Aug 28, 2019
Messages
7
Geek said:
Please take photos. Wrapper and top colours help identify a cell.
i have attached the image in my inital post


thunderheart said:
Lockon said:
the cell are in red wrapper

SANYO. Look at that red wrapper at different angles, there should be a marking embossed which is not so easy to see.

image_xivbai.jpg
i did see a M25Aembossed on the wrapper.Try very hard to get an image of it.
 

Wolf

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Sep 25, 2018
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1,288
Knowing Dell battery packs as well as I doesp. one of my favorites the 56Wh pack those are Sanyo UR18650FM 2500mAh cells.
Some have that information embossed on the wrapper some don't.
The cyan/light blueish insulation wrapper plus the 6 spoke pos cap gives it away.\

Wolf
 

Lockon

New member
Joined
Aug 28, 2019
Messages
7
Lockon said:
thunderheart said:
Lockon said:
i did see a M25A
Nothing else?
Ya thats from the 2 cell i have now
i will check the remain 4 cell once i am home
The other cell i check also the same


Wolf said:
Knowing Dell battery packs as well as I doesp. one of my favorites the 56Wh pack those are Sanyo UR18650FM 2500mAh cells.
Some have that information embossed on the wrapper some don't.
The cyan/light blueish insulation wrapper plus the 6 spoke pos cap gives it away.\

Wolf
Base on what you say i wonder could it betheSanyo[size=small]UR18650FK ones cause the[size=small]cyan insulation wrapper + the cap + the printout + the embossed almost the same


i have try my best in the pics

image_mgqwad.jpg

image_svxpzq.jpg
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Lockon

New member
Joined
Aug 28, 2019
Messages
7
Generic said:
The M25A just means it was produced in the 25th week of 2008. I second the FMs, I've got a bunch like that.
Err sorry i dont quite understand. i am pretty much very new to all these
could you do a layman term breakdown
 

Wolf

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Joined
Sep 25, 2018
Messages
1,288
Lockon said:
so the cell used is theSanyoUR18650FK?
Lockton,
You said that you pulled the cells from a dell pack that said 56Wh
So Overmind showed you the calculation that indicates that they are UR18650FM cells rated at 2500mAh.
3.7 voltsx2 parallel x 3 series x 2.5 Ah is equal to 55.5Wh

If you pulled the cells from a 46Wh or 47Wh pack then they would beUR18650FK cellsrated at2100mAh.
3.7x2x3x2.1 = 46.6Wh.

So according to your dell pack at 56Wh, no the cells are NOT UR18650FKs but they ARE UR18650FM.
Do not pay attention to the insulator ring as Sanyo has used blue, green, black, etc for the UR18650FMs
Not sure we can explain it any better that that.

Wolf
 

Lockon

New member
Joined
Aug 28, 2019
Messages
7
I see. thanks for the enlightment.
now i know i can use this way also as an additional intel to ID the cell that i salvage.

Thanks Wolf and Overmind!!
 
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