not working and it's not charging

not working and it's not charging
I have a problem with a ryobi one+ 18v li-ion battery 5.0AH it's not working and it's not charging up is there any way to fix it?

ANSWERS:

@Stephen Walker that would mean that it most likely your battery cells. You’d have to take the pack apart and check the cells. Now here is the downside. Some of those packs have an IC that prevents the battery from charging if their charge cycle count to high etc. Just another manufacturers gimmick from repairing the battery.