Carnegie Mellon University


The most accessible hardware component of a laptop is (usually) the battery. Rechargeable laptop batteries power the computer when not connected to a power supply. Learn what the different numbers on the battery mean, and more!


SAFETY FIRST: If you would like to follow along with our videos, please do so at your own risk. Disassembling a computer can void the warranty. Adult supervision and permission is required. Before taking apart any computers please be sure to shut down and disconnect any power supplies.