If the Plantronics Explorer 330 will no longer turn on, it could be that the internal battery is worn out. The battery is not replaceable, it is internally hard wired. A current replacement headset would be the Plantronics M20. Please see link below.
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If the Plantronics Explorer 330 will no longer turn on, it could be that the internal battery is worn out. The battery is not replaceable, it is internally hard wired. A current replacement headset would be the Plantronics M20. Please see link below.
Plantronics M20 Bluetooth Headset
Good luck from Headsets Direct!