Black Friday Continuous music playback time: Max. 30 hours(NC ON), Max. 40 hours(NC OFF)Continuous communication time: Max. 24 hours(NC ON), Max. 28 hours(NC OFF) Battery, Light will dim gradually throughout the product's use, so the given battery life is an estimate. Using lower brightness settings will extend battery life. Battery, Up to 30 minutes on Auto mode with electrical nozzle; 13 minutes on Turbo Mode; maximum 100 minutes on Eco mode with non-electrical accessory Battery