My batteries are genuine TW batteries, I wouldn't know where to get them from anywhere else.
I don't doubt where you got them or if they're genuine, I think you misunderstood the point I was trying to make

That bit of information about battery manufacture date originally came from the manufacturer of the Booster. If you bought those batts in December, it's still possible they were
manufactured prior to July of that year. I'm sure the TW team will get you sorted out satisfactorily, regardless
