The battery in my Hudl2 tablet is no longer holding it's charge and
I'm looking at replacing it. I've found videos showing the procedure,
looks straightforward, and eBay has lots of adds for "new" batteries.

The thing is that although these might be "new" in the sense of being
not previously used, they are probably 5-6 years old and maybe never
charged (certainly not recharged during that time).

Do these type of batteries have a shelf life, I've seen very mixed
reports by people who have bought them.?