Motorola HS850 - Manual (Page 14)

12 Using Your Headset
Using Your
Headset
Charging Your Headset
First-Time Use—Before you can use
your headset, you need to charge its
self-contained battery for two hours.
Recharging—When you hear five
rapid high tones through the headset
speaker, repeated at 20-second
intervals, the headset battery needs to
be recharged.
Over time, batteries gradually wear
down and require longer charging times.
This is normal. The more you talk on the
phone with the headset, the less
standby time your battery has.