I certainly wouldn`t drop it; that way is definitely the route to a new one.
Sometimes if you completely - and I mean completely, but DO NOT short it out, drain a battery and put it on charge continually for agood 18 hours afterward it can recover.
As for the freezer, it shouldn`t do any harm provided you keep it dry. Wrap it in cling film and bag it before you freeze it. After you remove it from the freezer leave it for a couple of days in the open to reach ambient temperatures before you try charging it.
One further point, make certain the battery casing is not damaged in any way - no leakage etc.