How to fix an old RYOBI 18 volt battery won...

take a hammer, and apply force. These batteries dont last forever... but i am serious about the hammer... you may be able to free up whats inside (if you know how a batterey works.)... also apply heat.. try to hit it from all angles than slam it down on the back and leave it sit... than try. I hope this works for you my dewalt batteries over the years have don this, and it works.. but BTW. it wont hold a charge for very long anymore.. the battery is pretty much garbage.