My Infuse 4G is always on Airplane Mode with Wifi turned on. I use it as a secondary device and like an iPod Touch/Media Player. However, even if Airplane Mode is on, the number one drainer of battery is Cell Standby at like 60-70%. Also, the phone never enters deep sleep and Android OS constantly keeps the device awake. As a result, from a 100%, the phone is dead within 8 hours. There has got to be some sort of fix for this. I'm running the latest Beanstalk 4.4.285.
P.S. I have entered AppOpps and denied the permissions to wake up and stay awake to the following apps: Google Search, Google Play Services and Android System.