We at heliguy™ have noticed quite a few calls over the past few days about batteries with the middle two LED lights flashing. This is caused by a problem during the software update, if the phantom looses connection via USB or power during the update you may encounter this issue. Fortunately the solution for this issue is very simple and only requires the latest version of the Phantom 2 Vision Assistant 3.6.
TWO LED LIGHTS FLASHING
Simply plug the phantom back into your PC or Mac (Note: PC will require the download of Win Driver) and go back to the updates page here you will see there will be "no updates" in text next to the battery, but by clicking this you will re-initiate the update process. Just ensure you do not remove the USB cable or power do unless instructed to do so.
Hopefully after this process the two LED lights flashing will be fixed and you will be ready to fly with all of the advantages of the latest firmware version.