Battery life varies by use and configuration. The Apple TV app movie playback test measures battery life by playing back 1080p HD content with display brightness set to 8 clicks from the bottom. Testing conducted by Apple in October 2020 using pre-production MacBook Air systems with Apple M1 chip and 8-core GPU, configured with 8GB of RAM and 512GB SSD.1TB = 1 trillion bytes actual formatted capacity less.
