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Google did make battery life improvements by reducing wakes at least on the Mac in response to Safari performing better. Some interesting details are at https://plus.google.com/+PeterKasting/posts/GpL63A1K2TF

Perhaps Edge will a nice competitive impact on the Windows side :P.

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Perhaps they should have cared years ago when this problem was first clear. I don't know about on Windows but on OS X the difference has been massive for years and years.

It's been true for a while on Windows, going back to IE9: https://blogs.msdn.microsoft.com/ie/2011/03/28/browser-power...

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