Plantronics Explorer 240 User Guide - Page 5

Charging Your Headset Your new headset performs best when it is fully charged. While your headset is charging, the indicator light glows red. When your headset is fully charged, the indicator light turns blue. Do not use your headset while it is connected to the charger. How to Charge Your Headset Using the AC Charger 1 Plug the charger into a power outlet. 2 Connect the charger cable to the headset. 1 1 Charging time 2 hours Full charge 1 hour Minimum charge before first use 2 2 note Never charge the battery where the temperature may fall below 0°C (32°F) or rise above 40°C (104°F) - for example, in an unattended motor vehicle. Do not charge the battery while it is unattended. 1