how to find when new hv battery is manufactured

Everyone knows how to decipher the earlier gen serial numbers, but very few people know this..so I'll just throw it out there...it's a Primearth secret, lol......but, having dozens of these cases available, with a little bit of analysis, …..

the 12020 portion of the serial number is the last 5 numbers of the part number. The next 5 digits are the manufacture date of the battery assembly....17801 ….17=year....8=month (1-9, A, B, or C)....01=day (1-31)...….August 01, 2017 ….the last 4 digits are likely just the sequential number of batteries built that day