![]() ![]() The iTunes movie playback test measures battery life by playing back HD 1080p content with display brightness set to 12 clicks from bottom or 75%. The wireless web test measures battery life by wirelessly browsing 25 popular websites with display brightness set to 12 clicks from bottom or 75%. Testing conducted by Apple in April 2019 using preproduction 2.4GHz quad-core Intel Core i5-based 13-inch MacBook Pro systems with 8GB of RAM and 512GB SSD and preproduction 2.3GHz 8-core Intel Core i9-based 15-inch MacBook Pro systems with 16GB of RAM and 512GB SSD. Testing conducted by Apple in June 2019 using preproduction 1.4GHz quad-core Intel Core i5-based 13-inch MacBook Pro systems with 8GB of RAM and 256GB SSD.1GB = 1 billion bytes and 1TB = 1 trillion bytes actual formatted capacity less.Configuration tested: 2.4GHz quad-core Intel Core i5 processor, 8GB memory, 512GB storage, Intel Iris Plus Graphics 655.The Wireless web test browses 25 popular websites.The quantity, L W A,c (formerly called L W Ad) may be computed from the sum of L W A,m and K v .K v is the statistical adder for computing upper-limit of A-weighted sound power level. ![]()
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