Something weird was happening to my battery last night

[dictoresno]

I've never had any real issues with my iphone 5. But last night around 9pm, I was at about 65%. I was off the charger since 2pm and had a lot of use which seemed at a normal discharge rate. All of a sudden, during normal use of playing words with friends, Text messaging and Facebook, the battery started tanking. Within minutes I was down to 60%. I noticed something was wrong so I did a hard reboot and closed all apps in the tray. Still started draining bad. I was losing almost 3% a minute or so. This kept up until I was at 20% then while using the phone, I watched it skip to 17% out of nowhere. Then to 11. Minutes later it skipped to 4% and gave me the under 10% warning, then immediately shut down as if it was on 0. Upon plugging in, assuming it was completely drained, it turned right on and said it at 11% when it left off at 4 when it died. Something really funky was going on and I have no idea what it was. Anyone else ever see this?

[FoxFifth]

My iPhone 4 (over 2 years old) dropped from 100% to 0% overnight with no usage. This happened shortly after the iPhone 5 came out and I was near an AT&T store early the next morning when I first noticed it. Nobody there had a clue (and they said they weren't trained in that type of support). Luckily the iPhone 5 was still in short supply or I would have bought one as I was convinced my battery was toast. I took it home, charged it and it has behaved normally ever since.

[dictoresno]

well with all the freezing, lag and reboots caused by the words with friends app, im convinced its the culprit. i was using it heavily last night. they really need to update that app.