Battery Management is always good on Windows Phone/Mobile 8-10 unlike power hungry Android/Iphone, the only issue with WP8.0-8.2 are most of the settings were turned on by default (NFC/Blutooth/Wifi Sense) which common user doesnt know how/where to turn them off, they changed most of this on Windows 10 Mobile, its much power saving now i could last 1-2 days on 950xl(3000mAh) with minimal use, i would assume yours would last even longer with 4000mAh+ battery.

This post has been edited by IccyAsd: Dec 27 2016, 10:10 PM