Ok, so I keep reading about short cycling batteries. I seee that when a battery is nearing time for charge, there is a drop in vapor and flavor. I have not noticed and drop in either of these until lights start blinking and its time to charge. Now I am noticing that my batteries are not holding a charge for very long. Does this mean I have killed them? I am out of work right now and can't afford much. Help.....can I save them or are they gonners?