Yesterday I drove 70 miles to court. I guess the battery should be charged.
Later I returned to the car and listened to the radio. About 5 minutes later, the radio turned off itself. Shortly after I turned the radio on again, I saw message on the radio screen "Battery Low, Radio Turns Off"
I drove the car for about 10 miles and then try to pair my cell phone. Saw the same message and the radio turned off before I could finish pairing my phone.
This morning I find out the battery is below 12 V. Charging system seems normal.
Now my car is in the dealership. They have to keep my car for testing and give me a loaner for 2 days.
I purchased my SE in August 2013. Now it got 28,000 miles on the meter and never have a battery problem.
Recently I had the SYNC update.