Lithium batteries right? I will say this once, never buy lithium batteries off ebay. No matter what any other person's positive experiance says, just don't do it. Used or unused lithium batteries have a finite lifespan from the date of their creation, and it's extremely low compared to any other battery chemistry (for large capacity batteries at least, coin cells are different). Many lithium batteries on e-bay are overstocks from bulk purchases that were likely made a couple years ago, the chemistry is already aged at that point and you can never recover that lost charge capacity even if the pack is still hermetically sealed from the factory. Any way you look at it it's a crap shoot unless you can get a guaranteed date printed on the battery itself that certifies it's date of creation. There's a good chance that the battery you just bought has the same or similar date stamp as the old one, even unused it's worth about as much as your old battery. Good luck finding websites that let you decode the date stamp, everyone is different and the manufacturer is going to be less than useless.