Tried searching web, but nothing accurately matched my problem. I've flown my airframe 7 times. Last time, I flew it to it's limit (battery). It took 4 days before I could get it back on the charger. I plugged it in, set for LiPo, 3A. All I've been getting for the past 3 hours is a blinking green light on the Charger LED status light. I'm plugged in to the correct balance socket. Any ideas?