How to find out the release date of a Samsung battery?

Question

Batteries

Battery AB803446BU from Samsung Xcover GT-2710 mobile phone, serial number S/N: TH1B615ES/4-B.
How can I find out the release date?
I bought it on Aliexpress, instead of the expected 3-5 days, it lasts only 1 day - not much more than the old battery, which lasts for a day (from morning to evening). On the new phone, the battery lived for 3-5 days in the same mode.
Buyer protection expires in a couple of days. I'm thinking of opening a dispute. If it is old, then I will present the release date.

Answer 1

The 4th character of the serial number is the year: B=2011, C=2012, D=2013, F=2014, G=2015, H=2016, J=2017, etc.
5th character - month: 1..9 - January..September, A - October, B - November, C - December
6th and 7th characters - the day of the month.
Released production date: 06/15/2011