"This browser is so dumb, it's saying that I can be identified by my battery level! Stupid Google!" ... I suspect many wouldn't understand the tracking implic

"This browser is so dumb, it's saying that I can be identified by my battery level! Stupid Google!" ... I suspect many wouldn't understand the tracking implications, and even many who can understand it wouldn't immediately make the connection. That said, this isn't the first such thing used to identify users. Other things like resolution, browser, extensions, etc, can be used to make a nearly unique fingerprint and this has been known for years. Search "browser fingerprint" and you'll find many pages on the subject.