https://batteryuniversity.com/article/bu-808-how-to-prolong-lithium-based-batteries
Note: Require more sources/research on this
It is a fact that performance per watt significantly decreases past the stock clocks (diminishing rewards), you can easily verify this with a CPU benchmark and HWiNFO.
However its up to you to decide what you prefer, faster applications at the expense of higher heat and power consumption.
My suggestion is to disable it and have a feel for yourself how much it impacts you based on your usage.