how old is my Odyssey

After Snetterton track day yesterday car would not start. No warning lights on during running , after 1/2 hour ign off before departing. would not start…all warning lights on and no start …started with a push.
Time for a new Battery I guess BUT

Can anybody tell me how old is my Odyssey 680 ?
Numbers :0574NO82550347 bar code

076923161008 ref on label.

DTs seem to have the best price.

£87.99 inc VAT and uk delivery here
http://www.ebay.co.uk/itm/ODYSSEY-PC680-PVR25-RACE-BATTERY-FIA-MG-MINI-LOTUS-CORTINA-ELISE-ELVA-CHEVRON-/161696872116?pt=LH_DefaultDomain_3&hash=item25a5e276b4