Test try with iPhone 4 on battery life

After updating to the new iOS 5.0.1, I am trying the battery life of the iPhone 4...at the moment it seems pretty weak, with 29 minutes of usage and 2 hours 19 minutes standy, the device is at 94% already...a drop of about 6% with only 30 minutes of usage...

Anyway will be hoping to see how it goes before it drop below 20%...