AMOLED (OLED) displays are generally known for their power-efficiency, since they don't use backlight. Instead of that, each pixel produces its own light.
Many of the Nokia Lumia Windows phones have AMOLED screens. Namely the Lumia 1020, 930, 925, 900, 820, 810, and 730. But, you've maybe experienced that the battery drains fast on them, especially when you browse the web or use Facebook or other apps with dominate white and other "non-black" colors. That's because a great number of pixels has to be turned on to show the white background or other shiny elements of web pages and apps.
The goal of this battery saving tip is simple. We want to show black color on the screen instead of other as much as possible. This tip can be also used on all other phones with OLED-based displays.
1. 0:08 First of all, if you have set the Light (white) background in the Start+Theme settings, you should switch to Dark (black).
2. 0:28 The second tip is to have a black picture as your background for the Start screen tiles (instead of default colors) and the lock screen.
3. 1:00 Remove all unnecessary tiles, especially light-colored or live tiles, from the Start screen.
4. 1:16 Set a black picture for your Lock screen background.
5. 1:55 In Windows Phone settings, disable Glance. It shows a clock when the phone is in the stand-by mode. The clock doesn't use many pixels, but disabling it still can help a bit.
6. 2:26 The last but not least, I've noticed that the main battery life killer on my Lumia 1020 is web browsing in Internet Explorer, due to white backgrounds on the majority of pages I visit. Here's a tip which can help you preserve the battery life while websurfing. In Internet Explorer, go to Settings / Advanced Settings. In the Reading View style section choose the Dark option. Now, when you visit a web page, a book-like icon will show up on the URL bar (after the page is fully loaded). Tap on it, and you'll have black background / white text look. Note: this feature is not supported on all web pages. It mostly works on blog posts and similar formats.
Also, you'll want to use as much black themes in apps as possible, if they are available.
Besides these tips, you should apply other Windows Phone power-saving settings, such as setting Brightness to automatic or low, putting a minimal time-out in the Lock Screen settings, lowering the number of apps running in the background, and of course using the Battery Saver feature.
Note: The phone used in this video is the Nokia Lumia 1020 with Windows Phone 8.1.
