Hello i need some help bad i have 2 heli's a BCP and a dragonfly 4 i am new have only been hover both heli's about 2 feet in the air i was fly them one night put them away when i was finished wok up next morning charged batteries and when i plug battery in the servos go crazy and will try to take off by its self my transmitter is on throttle down on both stick and trim it does it on both heli's also i bought new batteries thinking it might be a bad battery but nothing changed im think maybe the crystals but not sure cuase it does it where ever im am !!! Do crystals go bad???