Hey guys never had any battery issues as of yet today while doing a long distance flight all was well reached 13000 feet was coming back by the time it reached right above me it had 48 % battery left so I was like let's take it out a bit more like close range all of a sudden the battery icon went red but then it went back to blue so I let it go like 1500 feet away from me and I suddenly notice that the light started blinking constantly and showing the it had no bars it started loosing altitude as well even though low battery auto go home is turned off I suddenly started bringing it back towards me and held the stick up to maintain altitude but **** it was scary cause it was very close to the building it came home and had a rough landing but thank God it just tipped over and stopped no harm to the quad after bringing it back I run the motors and let it drain the battery and it went down to 13% and then stopped the motors then it didn't start. Checked the battery info it said normal advice guys what should I do?