I bought these headphones because the ad said they were compatible with both Kindle phones and LGV35thinQ phones. Battery life ranged from 2.5 to 5+ hours of continuous music streaming. I haven't tried it for regular phone calls yet, but the sound quality is good. The headphones didn't come with their own charger/plug, which could explain the difference in battery life. But it is a good product that maintains a stable connection. Bluetooth setup was easy. It can use an earlier warning to alert the user that it's time to charge.
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