NCR18650's with 3 digit codes, how to know mfg date?

CuriousOne

Enlightened
Joined
Oct 14, 2012
Messages
813
Hello.

A friend of mine gave me Panasonic laptop battery, which resulted in 4 NCR18650 cells. Internal resistance is low, now they are on discharge cycle and already passed 2300mAh mark, so they look promising. However, I can't get the date of manufacture. All online results consider 4 digit code, but these cells have 3 digit.

On the plastic shrink wrap, it says Cy0703. On the metal can itself, under the wrap, there are 3 lines of text:

J4A
26K
DCJ

Any ideas?
 
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