I’ll let a battery expert tell you instead.

Tell me what, that I agree with what the article you posted says? Seems self-evident in my initial response, pushing back against the “not going to see any improvement” comment …

There’s no need to get excited. Even if we end up using this in new gadgets, you’re not going to see an improvement in battery life.

That’s too much of a blanket statement to be believable as factual truth.

From the article…

Moore’s Law has simply outpaced battery technology, meaning that our phones have gotten better — and demanded more power — at a much faster rate than advancements in batteries have.

… and …

It’s not that there haven’t been any improvements: we’ve been able to steadily increase energy density over the past few years by shrinking down internal components. But according to Srinivasan, “Five years ago, it became clear we couldn’t remove any more things, there were fires. We’ve reached a stage where new improvements in energy density are going to come from changing battery materials, and new materials are always slower compared to what I would call engineering advances.”

Those are two different things. We’re using the new battery tech (and hence agreeing with the article), its just that the new battery tech can’t keep up with the computer tech’s power needs.