Hearing aid batteries (Cogges OX28)

I've got quite a lot of unused hearing aid batteries. I was going to return them to my audiologist for reissue to someone else however I noticed that they have a best before date on them (didn't realise batteries had this!) and they are all past it. I assume this means that they would just be binned, so I thought I'd see if anyone here could make use of them? There are at least 30, all unopened, as shown.