It is an immutable law of nature that when you receive a corporate email with a subject line like "Changes coming to your Pixel 4a," the changes won't be the sort you like. Indeed, a more honest subject line would usually be: "You're about to get hosed."
So I wasn't surprised, as I read further into this January missive from Google, that an "upcoming software update for your Pixel 4a" would "affect the overall performance and stability of its battery."
How would my battery be affected? Negatively, of course. "This update will reduce your battery’s runtime and charging performance," the email said. "To address this, we’re providing some options to consider. "