I was about to tell you to just replace the battery, but it turns out this is quite the ordeal with a Pixel XL: https://www.ifixit.com/Guide/Google+Pixel+XL+Bat

I was about to tell you to just replace the battery, but it turns out this is quite the ordeal with a Pixel XL: https://www.ifixit.com/Guide/Google+Pixel+XL+Battery+Replacement/88342 https://www.ifixit.com/Guide/Google+Pixel+XL+Battery+Replace... Awful. Who came up with the idea of going through the front? Took me like 10 minutes with my last two Xiaomi phones.