Save Your Kindle's Battery With These Simple Steps
Because of that, Kindles have a long battery life. That means you probably need to charge it every few days or weeks rather than once a day.
Still, Business Insider reports there are a number of ways to save the battery life on your Kindle--especially if it's aging and the battery is wearing out.
Keep your reading light as low as possible, and put your Kindle to sleep when you're not using it.
Next, don't have it connected to the internet when you don't need it. Switch it to airplane mode in the Settings menu.
Finally, when downloading books, charge both during the download and a little bit after, while the Kindle updates. That will save lots of juice!