Motorola S705 SoundPilot User Manaul page 27

 When charging completes (about 2 hours), remove charger from the
electrical outlet, and detach charger from the S705.
Note: You can also use a Motorola Original Vehicle Power Adapter to
charge the S705 battery while in your vehicle.
A fully charged S705 battery provides approximately:
• Up to 8 hours of stereo music listening and/or phone call talk time.
• Up to 75 hours of standby time.
Note: The S705 automatically adjusts Bluetooth power output based on
distance and environment to maintain connection with your device(s).
The amount of Bluetooth power output used affects your S705's battery
life.
 Getting Started