“Just bought portable Bluetooth speaker, Ns-hmps3018, batteries fully charged but speaker will not power up unless unit is plugged into outlet. Read everything in owners manual with no explanation. What is the trick?”
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I charged mine over night with the power cord and after that I’ve had no issues. To turn it on hold the power button down for a couple seconds I’ve noticed you can’t just push it quick. Hope that resolves your problem.
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