Panasonic NCR18650 Cell Specifications

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TheBatteries

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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:Panasonic
Model:NCR18650
Capacity:2900mAh Rated
Voltage:3.60V Nominal
Charging:4.20V Maximum
1925mA Standard
--- mA Maximum
Discharging:2.50V Cutoff
580mA Standard
5400mA Maximum
Description:Gray Cell Wrapper
White Insulator Ring
18650 Form Factor


Data References:
https://engineering.tamu.edu/media/4247819/ds-battery-panasonic-18650ncr.pdf

Pictures:

image_tpjuba.jpg

image_icmkfm.jpg
 
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is it normal if these batteries goes around 60 degres on charging? :/ is it safe? or all six bateries are bad?
 
xenixas said:
is it normal if these batteries goes around 60 degres on charging? :/ is it safe? or all six bateries are bad?
Click to expand...

Assuming that's 60C and you're charging at 1A, that's bad and I would discard those cells. I capacity test mine at 1A and they just get normal hand warm, nowhere near 60C. Maybe 25-30C if I had to guess...
 
xenixas said:
is it normal if these batteries goes around 60 degres on charging? :/ is it safe? or all six bateries are bad?
Click to expand...

I'm currently charging 4 of these at 1A (2 hours into the charging, so the temperature should be stable), my IR temperature gun tells me all the cells are between 44 and 46 degrees Celsius.
 
Got 4 of them from a dead-circuit Lenovo battery.
Will test them soon.
 
Does anyone have any experience salvaging these cells? I charged a few up last night at 700ma and they got up to ~45c once they were over 4v (4.01-4.1), I puilled them from the charger as soon as I noticed.I just started with four different panasonic ncr 18650s, charging them at 300ma, and want to see if there is a difference.
I'm using a LiitoKala li-500 and I'm brand new to this so any advice is appreciated.

Thanks!
 
EduardoKang said:
Does anyone have any experience salvaging these cells? I charged a few up last night at 700ma and they got up to ~45c once they were over 4v (4.01-4.1), I puilled them from the charger as soon as I noticed.I just started with four different panasonic ncr 18650s, charging them at 300ma, and want to see if there is a difference.
I'm using a LiitoKala li-500 and I'm brand new to this so any advice is appreciated.

Thanks!
Click to expand...

I have about 100+ of these cells, they all come from Batavus e-bike batteries.
I'm currently charging a new batch with 1a, and they get about ~20c at 4.18v. I have had a few who got hot during charging, but they also had a high internal resistance, I would recommend tossing them.
 
i just started a NORM Test on my LiitoKala li-500 at 1000mA with 4 these. They had a resistance reading at about 34, 31, 46, and 93.

The first 3 cells with the lower resistance reading got hot to the touch when they got to around 4.1v the 93 is warm but no where near the others. I removed the hot cells immediately and about 10 min later they were still hot.
 
mike said:
base2 said:
i just started a NORM Test on my LiitoKala li-500 at 1000mA with 4 these.
Click to expand...

The Littokala does not test at 1000mA. The highest current it tests at is 500mA.
Click to expand...


So the 1000mA is for charging only?


image_ihevhv.jpg
 
Yeah. When you set 300 or 500 discharge current will be 300/when you set 700 or 1000 discharge current will be 500. Charge current will as you set.
 
EduardoKang said:
Does anyone have any experience salvaging these cells? I charged a few up last night at 700ma and they got up to ~45c once they were over 4v (4.01-4.1), I puilled them from the charger as soon as I noticed.
Click to expand...
I just recycled 6 of these cells from a discarded laptop battery. The cells were manufactured wk 42 in 2015 (4y 4m old, i.e., not exactly brand new), and all had a voltage b/w 2.0 and 2.5V, which normally implies that you shouldn't expect the remaining capacity to be too high. I charged the cells @500mA using an XTAR VC2, and discharged them with l cheapo TP4056, starting at a bit over 1A, and decreasing to ca. 850mA at the end voltage, 2.7V.

Result: all cells yielded 2600mAh+ (2602, 2615, 2622, 2625, 2639, 2662), which is by far the best I have ever seen. I have recycled hundreds of 18650 cells, and i don't remember ever getting more than 2.2Ah. Granted, my sample size (6 cells) is small, yet, especially due to the relatively low starting voltages and the age of the cells, I would classify this model as excellent.

What comes to the temperatures, I would say that in normal charge/discharge tests, 45'C is definitely nothing to worry about, but 60'C probably indicates that there might be a puncture/contact b/w the roll layers, i.e., the cell is not safe to use or store in charged state.
 
Maybe someone will be useful
8 cells 2007 (0711), 4 pairs - I did not separate them. iMAX B6
Initial voltage: 2,0-2,1 V

Sequential testing each pair:
1. starting circle: charge CC-CV (1A, 4,20V; further similarly) - pause 30 days - discharge (1A, 3,00V);
2. capacity testing: charge (1A) - discharge (1A) - charge (1A);
3. self-discharge testing: pause 50 days - discharge (1A).

Results:
capacity - 4648-4674 mAh;
efficiency - 0,90-0,91;
residual capacity - 0,8;
self-discharge for 50 days - 6%.

Separate test for one pair in storage mode:step current charge up to V=3,85V - step current discharge to V=3,00V (init.cur.=1A)

Result:
capacity - 0,75 (ordinary in this mode - ~0,6);
self-discharge for 30 days - 1,7%

Resume: very good cells :)
In general, all of the old Panasonic that I tested (CGR and NCR, 2003-2009 and even 1996 :) ) were always good.
 
I am early in this process but getting a tentative feel for cells from laptop packs.

Found 6 of these cells in a Dell 60Wh pack (lower capacity Dell packs seem to use more brand variety where 65Wh+? have mostly been Samsung in my small sample of 10-15 packs).

The NCRs came out at ~2V while one cell with small bubbling (first for me out of ~80 cells) on the side, and it's partner which was visually good, were at 1V. Both discarded. The other cells tested to 2600-2700mAh which was fantastic. We'll see how they hold up over time and a couple more tests.
 
SNC10270.JPGSNC10271.JPGSNC10272.JPGSNC10273.JPGSNC10274.JPG

Calculator displays wrong date Wed Aug 28 2019. I dismantled my laptop battery about 8 years ago.
 
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jeffy6 said:
The ones with the dots around the positive terminal are fake AF
Click to expand...

You might find they are spot welds from recycled cells.
 
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