People used to the original E-Ink Kindle (which lasts for over a month on a single charge) may be shocked to find out that the Kindle Fire has an only about eight hours of battery life. This is because of the backlight in the Kindle Fire display and its in-plane switching technology requires significantly more power than the original Kindle and its E-Ink display. With that in mind, here’s some battery power savings suggestions for your Kindle Fire.
Use the Sleep Mode
The primary battery is used whenever the Kindle is turned on. By setting the Kindle Fire to 'Sleep Mode,' the Kindle will time out after a period of inactivity. This is especially important if you like to browse the Internet or watch videos. Sleep mode can help extend the battery to last for many of days. Sleep Mode is activated by pressing and releasing the 'Power' button at the bottom of the Kindle. You can assign the number of minutes of inactivity before your Kindle Fire automatically goes into sleep mode, anywhere from '30 seconds' to '1 Hour'. Another option to auto-sleeping the screen is to set your Kindle Fire to auto-lock after using. By locking the Kindle Fire, it will go into a 'sleep' mode thus conserving energy and extending your battery life. To change the lock settings, tap the settings bar at the top of the display and choose the ‘More’ option. Then select 'Security' and establish a password for your lock screen.
Turn Off Wi-Fi Whenever you are not using Wi-Fi
You can turn Wi-Fi 'On' and 'Off' as needed. If you’re on the Internet or interacting with Amazon’s Cloud, then you won’t be able to turn off Wi-Fi to preserve your Kindle’s battery power. If you don’t need the Internet, then you can turn off the Wi-Fi by tapping the settings bar at the top of the Kindle Fire and choosing 'Wi-Fi'.
Use Your Headphones Instead Of Speakers
Do not use the built-in speakers on your Kindle Fire. Use earphones instead.
Manage Your Kindle Screen Brightness
You can also optimize the Kindle Fire's battery life by lowering the brightness of your Kindle’s screen by dimming the screen so it’s not as bright. As far as reading books and novels, it's generally preferable to read on a darker screen. You can lower the brightness of the screen by tapping the settings bar at top of the screen or via the Display screen. Slide the bar to dim or brighten to your personal taste.
Charging Your Kindle Battery
Lithium Ion rechargeable batteries, like the one found in the Kindle Fire (and used in many other tablets like the iPad), shouldn't be continuously charged. For optimal battery life on your Kindle, only charge the battery when the power gets low. Other wise your Kindle battery will develop a memory effect and not last as long. To prolong your battery’s life, you should completely drain the battery once a month, then charge it back to its full capacity.
