Panasonic NCR18650PD batteries from FT
I can’t read this date code(this same code is on 20 batteries)
Please help!
Here is the picture:
Thank you in advance!
It looks like it says “Bav 2X24“
:bigsmile:
That's all the help I can give on this one. I don't know how to translate that into a date. ;) :p
Yes I can read that also 
Anyone? This is weird date code…
I just found this from fellow member BOAZ:
Date codes on Panasonic batteries
Cylindrical type batteries: (Four Digit Date Code Used)*.in this case the code is 8517
1. The first digit shows the last digit of the year ( 8 = 2008).
2. The second digit shows the month code…… 5 = may
The following codes are used to indicate the month:
1 = Jan., 2 = Feb., 3 = March, 4 = April, 5 = May, 6 = June, 7 = July, 8 = Aug, 9 = Sept.
0 = Oct., Y = Nov., Z = Dec.
3. The third digit shows the week of the month. Week 1
1 = First week, 2 = Second week, 3 = Third week, 4 = Fourth week
4. The fourth digit shows the day of the week….7 = Sunday
1 = Mon., 2 = Tues., 3 = Wed., 4 = Thur., 5 = Fri., 6 = Sat., 7 = Sun.
The date code indicates that the battery was assembled on Sunday the first week of May 2008
Taken from this thread post #66 Panasonic 18650 2350mAh batteries
Thanks for this,
But however Pana NCR18650PD has X mark which is not on given date codes
So if we use this table I can decode something:
2=2012
X=?(it should be month but which? Since it is not on this pana date code table…? )
2= second week
4= Thursday
I have the codes for the Sanyo cells, but this was all I could come up with for the Panasonic cells. I am not sure what the X means. I would guess it should be the month.
My guess is there is a revised/improved date code in which they replaced 0 with X (this follows the 11=Y, 12=Z pattern and removes possible O/0 confusion). However, those cells with the X also have two stacked letters above the code and beside the big letter, which none of mine have…so it may be a different naming convention.
I have two 18650A with x in the datecode too and I too wondered when I got them…
I for me think that X stands for 10 as it is roman count(not sure how that gets translated) and would easyly intend that y and z are 11 and 12, that would be smart and make it easy to recognize…and the Japanese are smart.
Thanks guys,
X=10 it really makes sense
So date results for Fasttech battery are:
2=2012.
X= 10 month
2= second week
4= Thursday
Very good cell
Excellent!
to just stamp it 10-11-12?
Either it’s BAV or BAU. That font often confuses the letters in the Latin Alphabet. I wonder some manufacturers are fond using this kind of font.
A where the B is on yours, U turned sideways on top of V then 2506 under them. Another one that I got at the same time is just like yours except for the X, but I can’t really make it out. I’ll see if I can get some pics of all my Panny’s tomorrow.
With the U and the V together, it’s easy to tell they’re not getting anything confused. 
I ordered 4 pieces of NCR18650PD from FT.
2 are BAV 2X24 and other two are CAV 2x24.
All were 3.55V from the box.
I’m pretty sure the big letters are batch number and machine number identifiers, several other battery codes I looked at include those with the dates, but this is just an educated guess.
New version of Panasonic 18650 Battery has 2 bars – a narrow bar and a wide bar. But the old version only has one narrow bar on the PVC. If you see a Panasonic 18650 battery has dot matrix on its top, it must be very old and be manufactured before 2009.
No matter new or old version, the same date code rule is followed.
You saw the 4 numbers(sometimes numbers+letters) on the bottom of the battery? They indicate the battery manufacture datecode.
- The first digit = year(0 = 2010, 1 = 2011, 2 = 2012, 3 = 2013, 4 = 2014, 5 = 2015, and so on).
- The second digit = month(1 = Jan., 2 = Feb., 3 =Mar., 4 = Apr., 5 = May., 6 = Jun., 7 = Jul., 8 = Aug., 9 = Sept., 10 = X, 11 = Y, 12 = Z).
- The third and the fourth together = day(01, 02, 03, 04….29, 30, 31).
According to the rules, the battery above is made on 2013-01-26.
The source is from TomoBattery
Good to have this. Thanks!