I noticed once my Ipad alarm goes off when the battery is at 30% and I start to bring it back within 20 or 30 yards I loose just about all control. As it gets within 4 to 5 foot of landing it crashes. Almost at a point of a fly away. It still shows around 10% power. Is this normal when it gets this low. Below is a picture of one of the places I was flying and noticed this happening. There are no phone lines or power lines around that might be causing this.