Sennheiser RS 145 Comfort Instructions for Use - Page 14

/ Putting the RS 145 comfort system into operation Charging the headphones' rechargeable batteries Charge the rechargeable batteries for at least 16 hours prior to first time use. Subsequent charging time is K about the same time as the previous operating time. The operating time is up to 23 hours.   &+$5*( 0'' 0/ ̈ Place the headphones on the charging cradle 7. Make sure that the charging indictor 9 lights up red. The headphones automatically switch off and the rechargeable batteries are being charged. Always store the headphones on the charging cradle 7 to ensure that they are fully charged when they are needed. When the rechargeable batteries are fully charged, the transmitter automatically switches to trickle charging and the charging indicator 9 flashes slowly. Nearly discharged batteries will significantly reduce the sound quality. Approx. 10 minutes before the batteries are completely discharged, an acoustic signal is produced. 10