I thought my stock case was getting worn out, because the kickstand would no longer stay fully closed. So I bought a new one, and it's doing the same thing. But in swapping it out, I noticed that the kevlar was bowed out a little. It turns out that my battery is starting to swell after almost 18 months. Is this common? There seems to be no degradation of my battery life; it still lasts about as long as it used to. But I worry about damage to other parts of the phone (i.e. cracked screen). What are my options? I don't have insurance - will Verizon replace the battery or phone at this point with no fee?