Extend the battery life on your Microsoft Lumia 950 XL by not feeding Edge

Getting control of the Edge browser on your Lumia 950 XL can improve the batter life of the phone
There happens to be a couple of solutions. One is to make sure that Edge is closed when you're done using it.You wouldn't leave yourrefrigerator door open after taking out a cola that you're going to drink, so why keep your browser open after you are done with it?The other thing you can do is to stop Edge from running in the background by going to Settings> System> Battery Saver> Battery Use. Click on Edge, then on Details. When you come to the selection "Allow this app to run in the background," toggle the switch to off.
Making sure that the Edge browser is not stuffing its face with juice from the battery is an important step toward getting more time between charges on your Lumia 950 XL.
source: WMPoweruser
Things that are NOT allowed: