I flew a DJI Phantom 2 Vision+ a week ago. After flying for 5 minutes a message entered on the screen "Battery problem" or failed, I dont remember. And "Please land immediately" or something like that. Front LEDs was red and the other on the rear arms blinked red. I flew back, landed and disarmed. No message left. What happened? The battery got the latest firmware. Three green LEDs where light up when I landed.