My battery keeps dying, I don't just mean the voltage drops a little, and it doesn't turn my starter over, but it is either shorting out inside, or a cell is opening up somehow. The battery will work flawlessly for about 3 or 4 long rides, then in the middle of a ride the battery will go from working perfectly to absolutely nothing. when I put a voltmeter on it, the voltage is zero, it isn't just worn out it is dead. If i put a charger on it, the instant I turn it on it says it is charged...but obviously it's not. Every time this happens I have to replace the battery. Any help would be greatly appreciated.