Low Power Mode on the Mac (Feature Request)

My late 2013 top-of-the-line Macbook Pro has been recently overheating, with battery life that has become very short. My battery health indicator dipped below 79% with less than 600 charge cycles (Apple says it should last at least 1,000 before reconditioning.) I have almost started to convince myself it is time for an upgrade, but then...

In a hunch I decided to give Safari a try, and stopped using Chrome. The result? Laptop is almost always cool to the touch, battery lasts for 5 hours with my typically light use. It has been a great experience overall, highly recommended despite the costs of such a switch.

I will of course, take Marco's advise and make my laptop even more efficient with energy.