Hi, i have 3 DJI phantom 2 "smart" batteries, 2 of them have swelled up for no apparent reason and they aren't even 3 months old! I have NEVER overcharged them(although theoretically you can't) i have NEVER left them unnatended, and i never run my Phantom2 under 30% charge. Needless to say i am extremely pissed off, that these EXPENSIVE batteries, are swelling up after less than 3 months of use! Is this common? has anybody else here had that problem? Should i keep using them? DJI hasn't returned my emails and i have US$320 worth of batteries that i am simply scared to use or charge given they might explode! They still give me full 20 minutes to 30% flight time which is normal, but i don't think i should keep using them... Any help/suggestions please? thanks