Some Plantronics Headsets have a switch for Wide Band Mode. Wide Band Mode is used to improve QOS on phones that currently do not have appropriate or low QOS. If you have “Quality of Service” this mode is unnecessary and also utilizes a lot of the battery charge. Turn this switch off; it is the switch closest to the jack on the left side. This should help with the headset to be able to hold its charge for longer time frame.
// FAQs // My Plantronics CS 540 Wireless Headset is not holding its charge for the estimated battery life, how can we improve this?