Back in 2015, I experimented with disabling Turbo Boost and discovered that it reduced performance by about a third, but also boosted battery life by almost as much. Since then, I’ve been running Turbo Boost Switcher Pro to automatically disable Turbo Boost when I’m running on battery power, and it has been wonderful: I made it through that 8-hour flight only because Turbo Boost was off. Over the last few days, I’ve run battery tests on my 2018 13-inch MacBook Pro with the (awesome) 2.7 GHz i7 and my 2015 2.2 GHz 15-inch3 to see how far I could push the battery life using Volta, which can disable Turbo Boost and/or set wattage limits on the CPU.