Microsoft kicked off a battery life war with Google’s Chrome browser last year, and Google has been responding ever since. While Chrome 53 initially marked an improvement for battery life, Google is releasing Chrome 57 this week with further power reductions. Google claims background tabs “consume a third of Chrome’s power usage on desktop,” so the company is doing something about them.

In the latest 57 release, Chrome will now throttle background tabs using excessive power. While Chrome has been throttling background tabs for years, the latest update will throttle tabs to limit the average CPU load to 1 percent. Tabs that play audio or use real-time connections won’t be affected by the changes. Google isn’t revealing exactly how much…

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