Google Pixel greatly improved on battery life compared to previous Google Nexus phone. Google Pixel comes with a non-removable 2,770 mAh battery, while the Pixel XL comes with a 3,450 mAh battery. The Pixel has only 2.6% higher cell charge than the 5X, but it tops it with 8.6% better standby time, over 30% more talk time (6 hours more), over 44% higher Wi-Fi Internet use and more than 62% (5 hours difference) Internet use time over LTE. Vid and audio playback also top the Nexus 5X by 30% and 46.7% respectively. Just keep in mind that those numbers are based on the official battery life measurements provided by the phone manufacturer and may vary in real life use.
A few of the reasons for this big improvement is the use of the new Snapdragon 821 microchip which has a CPU that it twice more efficient than the Snapdragon 810 used in the Nexus 6P and the Adreno 530 GPU is 40% more efficient than the Adreno 430 GPU. Google also introduces various battery life enhancements in its new Android 7.0 Nougat operating system, mainly for optimizing the battery life when the phone in a standby mode.
The Google Pixel battery will provide you with sufficient power to run the phone all day long without recharging the battery (for an average use). If you encounter a time where you need to charge the phone, you can rest assured that the 15-minute fast-charging feature using the bundled charger over USB-C will provide you with approximately 7 hours of battery life (time may vary depends on the usage). The Google Pixel was designed to allow users to enjoy digital content for a longer period of time compared to the latest Nexus phones.
Nowadays people consume, create and share more and more digital content, including photos, videos, games and let's not forget about Daydream VR which is available for Pixel users as well. It's a mobile device after all. Even if you are outside your house, sometimes there aren't any convenient ways to charge the phone, and you rely on the phone's battery to provide you with enough power for the phone to last through the day. You can always buy an external battery pack, but it's great to know that phone manufacturers are continuously working to improve the battery life so you can enjoy your phone without always thinking about how much percentage is left until your phone turns off.