The Google Pixel XL marks a premiere for the Android team, as the phone was designed by Google from back to front and is said to be the most optimized device that the OEM has rolled out.

This gives the device extra oomph, as deep-level optimization usually means increased maximum battery life. By removing third-party skins from the equation, it makes Google entirely responsible for the actual results of the power source.

Phone Arena did a thorough testing of the 5.5-inch Google phone and used it in typical consumer fashion so that it can gauge what its actual battery life is. According to the tech website, all its power source tests are done with the screen brightness at 200 nits, so it is easy to compare the performance of rival smartphones' batteries.

The Google Pixel XL fared pretty well, but somewhat less than it was expected from the best Android smartphone to date.

Specifically, the XL's battery life offers 7 hours and 19 minutes of screen-on time, showing that the phone can hold its own against the Samsung Galaxy S7 edge. The power source battery life on the Google phone is above those in the Nexus 6P, LG V20, and a slew of Android rivals.

However, when pitted against the Apple flagship iPhone 7 Plus, Google Pixel XL lags behind. That is, because the iPhone phablet banked 9 hours and 5 minutes of screen-on time during identical testing conditions.

Keep in mind that Pixel XL's power source is a hefty 3,450 mAh non-removable battery, while the iPhone 7 Plus sports a 2,900 mAh battery. Meanwhile, the S7 edge carries the largest power source of the three devices, at 3,600 mAh.

Phone Arena points out that the Pixel XL had enough juice for a full day of tapping into the Google handset's potential. Moderate use might yield users 36 hours of use, but it will take some time before seeing a flagship that can last two full days on one recharge.

On the bright side, the Pixel XL comes with quick charging support: you can go from 0 to 100 percent hero in only two hours of charging, via the built-in wall charger.

Despite being 20 minutes behind the quick charge solution from Samsung, it overpasses the iPhone 7 Plus, which needs no less than 3 hours and 20 minutes to get a full battery.

The Pixel XL costs $769 and offers formidable specs alongside the powerful battery, which may lure some Android mobile fans who prefer non-explosive phones in their pockets.

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