The title is accurate. The Google account linked to says just as much.
> The post quite literally says it's an experiment, accidentally enabled. A bug.
And this can be accurate too, without being in conflict with any claim in the title.
> Literally an A/B test, which they do all the time.
On accounts enrolled into beta programs. Not on regular accounts. This one happened to phones with only regular accounts.
> The title makes it sound like they hacked in your phone.
The title makes it sound — at best — as if it was unexpected. Which it was. The title does not make it sound like they "hacked in your phone". Perhaps you're reading some outrage in the title that isn't there.
The title is: "Google remotely activated battery saving more on multiple people's phone today", which they did (saw it on my own 2XL). That's it. That's a fact. There's no mentions of Google hacking anybody's phone.
The title makes it sound like they hacked in your phone. With that logic, any time your apps update or you get a notification, you're getting hacked.