My Battery has been suffering since I got my TB. Even just setting it down and not touching it for half hour, it would go down about 5-8% Just about an hour ago I went thru my list of installed apps and something made me un-install Tango (One of the first apps I installed). I starting thinking that maybe Tango is keeping my Network ACTIVE in case someone is trying to contact me? I noticed my 4G Up/Down arrows would light up constantly every few seconds so I knew something kept trying to "Reach out" Once I uninstalled I rebooted and let my phone sit for half hour. Lo and behold the battery hasn't gone down at all. Still testing my theory, but if you are someone with battery Drain, and have tango installed then give it a shot! _______________________________________ UPDATE: Ok, many hours later and I love my Thunderbolt again. Battery drain is stable and is draining normally once again. To everyone running Tango and having any sort of issues (Especially Battery) consider un-installing as part of your troubleshooting.