https://www.reddit.com/r/apple/comments/1fguko2/everyone_say...

> In my 3-hour tests, Safari consumed 18.67% of my battery each time on average, and Chrome averaged 17.33% battery drain. That works out to about 9% less battery drain from Chrome than Safari. Yes, you read that right, I found Chrome was easier on my battery than Safari.

With how much engineering was poured over V8, I don't doubt.