What is your weather like? If you are flying in cold weather that may be the cause. I took my Axe outside when it was around 20 degres out. It flew for about a minute then gradually dropped like the battery was dieing. Replugged the battery in and it did just about the same as you described. Let it sit in the house for five minutes and tested it in the house, worked perfectly. I would suggest flying like you normally would and when it dies take it inside and let it sit for a few minutes then try it in the house, just to see if it responds. If you are in warmer weather it is probably the 3-1.