Where in the Motorola S9 bluetooth headset is the Battery located? How do I get to it and replace it?

The battery cannot be changed.

Mark
Motorola Support

You don't replace the battery, it is a rechargeable battery and can not be replaced. All you can do is recharge it. To do this read the directions in the manual. If you don't have a manual you can read the one at this link:
https://motorola-global-portal-en-ca.custhelp.com/ci/fattach/get/593369/1361470436/redirect/1/session/L2F2LzEvdGltZS8xMzgzMzAxNzk4L3NpZC9YekRHM2ZFbA==/filename/S9_User_Guide.pdf

A solution to replace the Motorola S9 bluetooth headset 's battery is here :
https://www.google.com.ar/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwiR0oaK7_jTAhXHDJAKHSq4Af0QFggsMAA&url=https%3A%2F%2Fwww.makomk.com%2F2014%2F05%2F19%2Freplacing-battery-motorola-s9-bluetooth%2F&usg=AFQjCNEztAcqZ2BGvLAC6zlJGQ2x7hjGnA

do you have the adapter that makes your ipod nano have bluetooth?

im guessing you do so

turn on the bluetooth adapter on the ipod

mod the power button on the motorolla s9 untill blue light is constantly on

from the ipod select the bluethooth options and select the headset

use the password 0000

Your acer does not support Stereo bluetooth. Its different from your common bluetooth headsets.

I downloaded the instructions manual for the Motorola S9 HD and implemented them. It worked fine!

assuming you have bluetooth installed on your laptop,
1) you have to disable the bluetooth pairing of your s9 with another device that you may have paired with it earlier - like a mobile phone. disconnect previously paired devices first.
2) turn on the bluetooth feature on your pc and ask it to "search" for devices. assuming your s9 is on standby, your pc should be able to "locate" and pair with it assuming the s9 is within an arms length distance from the computer.
3) make sure that the s9 is completely charged to eliminate that power issues as well

The mic stopped working on my S9 after 2 weeks and removing the BT device and repairing did the trick...try removing the S9 bluetooth device from phone, then re-adding and pairing again. this worked for me (I have an LG Voyager that I use with the Motorola S9). .

i have try this before i couldnt do it untill i tryed using the same bluetooth brand as my head phones worked straight away

Motorola S9 bluetooth headset 's battery is FIXED no user can replace it and Motorola "Washes their hands on that " somebody should sue them for selling these headsets without any comment about the fixed battery.