My 6 month old vision battery alarm is going off at 40-45 percent and then several times before 30 percent. It usually only last a few seconds and the lights go red on the phantom, then back to green when alarm stops. It has about 75 cycles, and I have updated and recalibrated everything in the phantom. My flight times still good and the phantom flies very well. I am just concerned about the alarm going off so early. Any suggestions?