spmug 592 Battery Changes on a Laptop Q. My laptop is old and its battery won't hold a charge anymore, so I always have to keep it plugged in to use it. How difficult is it to replace the battery? A. Laptop batteries are usually pretty easy to replace, since they were generally designed to be removable in the first place and pop out once you press the release switch on the underside of the computer. As for finding a replacement battery, you can usually get one from your laptop's manufacturer. There are also many online stores that sell batteries for many different brands of laptops, but make sure you get the right type with the correct voltage for your model. Laptops for Less (www.laptopsforless.com) and Batteries.com (www.batteries.com) are two such shops.