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Bought these to support a display where folks could come up and press a button to hear the audio portion of the display - so one track looped. Unfortunately buttons are a bit unresponsive so needed to press them a few times before it would either play or stop. Also at times had a 5+ second delay before actually playing...not ideal for this application. Cannot really comment on battery life as I just got them - so gave it that a "4" for now