See, it's a sad (and expensive) fact of life: You're lucky to get 18-24 months from a battery before it loses a good chunk of its charge capacity (meaning it no longer powers your laptop batteries for as long as it used to). Because the battery rarely (if ever) gets a chance to discharge, it loses its capacity to hold a charge. The simple solution: Pull the battery out of the laptop and leave it out when you're deskbound. Most laptops can run on straight AC power, so there's no need for the battery. So it's in your best interests to keep your battery as long as possible, and to keep it from dying a premature death.