I wasn't too sure about it, however the seller confirmed they would work, so i took a punt.
1900mAh Battery x2 + Main Wall Charger for Samsung i9250 Galaxy Nexus
They fit perfectly in my O2 UK version of the Samsung Galaxy Nexus
One in my phone right now, the other in the wall charger.
So they aren't NFC's... but I am thinking a tenner for two batteries and a charger, cant be bad. I'll keep an eye on the charger so it doesn't burn my house down.
I am running a calibration using Battery Left PRO, to see how it compares with my stock battery. My stock has 25hrs full life
eBay link here