The battery life is amazing! My other bluetooth couldn't help me get through an 8 hour work day. I had a second at work to pick up where he left off. I didn't test the 28 hour theory because I don't sleep that long. I will say that I turn it on at 5:30 am and it still works until I sleep. That can be anywhere between 10pm and 1am. Plus you get 2 of them! Crazy drop the mic!
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