Depending on the model of your Plantronics headset, you will hear a single tone every 15 seconds if it’s on low battery, or the power indicator will flash.
If your headset has a single multi-function button, start with it off, then press and hold it for 5–6 seconds until the light start flashing. If your headset has a sliding On and Off switch, hold the call button for 5–6 seconds until the light starts flashing. For headsets with a On and Off button, start with the headset powered off and hold the Power button down for 5–6 seconds until the light starts flashing.
