Kindles are built to last, so you can lose yourself in your favorite books for years. But for how long should you expect to use a Kindle? Amazon promises at least four years of security updates for every Kindle it sells, yet many devices stay in use well beyond that window, with some people even getting 15 years from one unit. However, a Kindle also can become effectively unusable long before it physically breaks down. Software support ends, batteries lose their capacity to hold a charge and...
