Battery specs question

hel2000

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Jan 15, 2021
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4
Hi all, I've come across a bunch of battery packs I don't know what type they are. They came from a Motorola modem, 3 in a pack.
I'd appreciate if anybody has some specs, thank you. Henry.
Here's a couple of pictures:

1610887276982.png


1610887399029.png
 

anton_voltx

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Jan 13, 2021
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13
Showing the positive pole of the cell and writing down any markings would help ID them.
 

anton_voltx

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Jan 13, 2021
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As others have said it's a Sanyo with model UR18650F. Keep in mind this model was released 20 years ago and gets updated over time. If your cells aren't rusty you should reference datasheets from the last few years since the older ones may be outdated to get an idea of their capability. Generally speaking these cells are very utilitarian and are used for low-cost small-format applications like a modem or laptop battery.
 

ajw22

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Nov 16, 2018
Messages
531
I'm guessing a bit, but the pictured pack was probably manufactured in 2006 week 51 (Label code "MCSA0651"), which fits with the modem release year of 2007.
Probably shouldn't expect too much from such old cells. If you do test the cells, please post the results.
 

hel2000

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Jan 15, 2021
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The numbering is very difficult to read, the ones I got I had to use a magnifier to read that number. There're other numbers (in black letters) but they vary with each cell, and difficult to read too.
I'm guessing a bit, but the pictured pack was probably manufactured in 2006 week 51 (Label code "MCSA0651"), which fits with the modem release year of 2007.
Probably shouldn't expect too much from such old cells. If you do test the cells, please post the results.
Yeah, you're right, they are from that vintage. I'm in the process of testing now. One thing I notice so far is the IR in very high ~200 m-ohms.
Should I be using these cells? So far I charged ~ 120 cells using the Opus charger and they hold charge. I'll re-test and record the numbers.
Thanks!
 

Dr. Dickie

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Sep 23, 2020
Messages
80
If it is this Sayno.
Sayno UR 18650F
Then the manufacture list 100 mOhms as the max IR.
200 mOhms would be pretty high.
Is that the IR from Opus?
If so, it is likely way higher than the real IR
 

Wolf

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Sep 25, 2018
Messages
1,321
If it has 6 spokes then it is a Sanyo UR18650FJ 2100mAh With the "Orange" insulator ring its the only possibility.
The J can be very hard to read. I use a fat sharpie with a paper towel to highlight the numbers/letters

20201208_203808.jpg20201208_203708.jpg
 
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