Ever since the 4.4 KK OTA upgrade I've been noticing a massive battery drain on my phone when I'm driving in my car. I have a Ford with the MyFordSync stereo. With the latest update to Hangouts I'll see 15-20% battery usage for hangouts and bluetooth. The culprit appears to be StartingObexMapTransaction in com.andorid.bluetooth.Bluetooth. The wake lock lasts for as long as I'm driving (which also means for as long as the phone is synced up with the myfordsync). I didn't see this in 4.2 and the battery drain is slightly better if I uninstall the Hangouts update.
Does anyone else have this issue? It is exceptionally annoying, especially on days when I spend 3+ hours driving. I try not to keep my phone plugged in when driving to avoid unnecessarily putting the battery through charge cycles.