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Battery light is always red | SoundLink® Bluetooth® speaker III
soundlink®-bluetooth®-speaker-iii
SoundLink® Bluetooth® speaker IIISold from 2014 - 2017

Battery light is always red | SoundLink® Bluetooth® speaker III

Check if the connected power outlet is working.

When connected to power, your product plays a tone. If you plug in but don't hear a tone, try plugging in another device (i.e. a lamp) to the same power outlet to confirm the outlet works.
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Battery light is always red | SoundLink® Bluetooth® speaker III