Yes controllers can be used with any other P4P. You just need to link them.
Wow man sorry to hear that. Really terrible. Do you have any idea what could of caused it?
I think I didn't make sure the battery was pushed in tightly, I always push the battery in tight until it clicks, then I try to pull it out. The only thing I can think of is that I didn't follow my own procedure! You will love your P4P, just be sure to install battery properly!