Huawei's latest flagship - the P9 - comes with a 5.2" IPS 1080p display and is powered by a newer Kirin 955 chip with an octa-core processor, efficient Mali-T880 MP4 GPU and 3GB of RAM. It has a sealed 3,000 mAh battery. The supplied charger is a regular 5V/2A, but that's still enough to fill about 35% of the battery in half an hour. The phone runs on Android Marshmallow with the latest Emotion 4.1 launcher. Huawei promises an energy-efficient chipset and software package. Indeed, we found lots of battery optimization options in the new Emotion UI, which you can enable and will save...
Source: http://www.gsmarena.com/huawei_p9_battery_life-news-18025.php