When in music mode with ANC mode turned off, the earphones play music back continuously for 8 hours and the overall battery life, including the charging case, is 35.5 hours. When in music mode with ANC/transparency mode turned on, the earphones play back music continuously for 5.6 hours, and the overall battery life, including the charging case, is 24 hours. When in call mode with ANC mode turned off, the earphones play music back continuously for 5.2 hours, and the overall battery life, including the charging case, is 24 hours. When in call mode with ANC/transparency mode turned on, the earphones play music back continuously for 4.7 hours, and the overall battery life, including the charging case, is 21 hours. Testing conditions: AAC mode, music playback at 50% volume. Charging and battery tests are based on testing conducted by Nothing (at a temperature of 25°C or 77°F). Actual battery life depends on factors such as volume, frequency, output source, environmental interference, product features and usage habits. Actual experience will vary based on individual usage.