Also: The latest Pixel Drop arrives with 8 useful upgrades for your Android phone - what's new

Google hasn't acknowledged the issue (I have reached out), and I didn't see anything out of the ordinary in my phone's battery usage info, so there's no official fix yet. Users have speculated about different causes, but nothing has been confirmed.

In the meantime, here's what I'm doing to conserve battery. ZDNET's Jason Howell put together a list of 8 ways to prolong your Pixel's battery life, and while none of them specifically target the current issue, they will help your phone last a little longer. I implemented a few of these, and from 11 a.m. to 2 p.m., my battery only went down 20%, or about 5% an hour, with about the same usage.

The most obvious option is to enable Battery Saver. This limits background activity on your phone, reduces your screen brightness, and slows the CPU, among other things. You don't lose much functionality, and you get a much longer battery life. There is also Extreme Battery Saver, which turns off more features and pauses most apps. This is under Settings > Battery > Battery Saver.