Thank's Keef. The only thing I can see on the Battery, is 08B in front of the bar code. Miles of Eastern hieroglyphics and 3-197-929-03
I'm hoping that 08B is the year and the month. Bat type is VGP-BPS9/B Li-ion
One thing that's come to light is that I can't find the receipts for either lap-top! They'll be somewhere.
But the date of sale was somewhere around 8 weeks ago. I'll look tonight.