Replacing the Battery in the MB Pro 1 Headset
The battery in the MB Pro 1 headset is located in the side of the headband that does not have the microphone boom (see attached pictures).
1) Using your fingernail, remove the battery cover from the headband (pictured at right)
2) Gently disconnect the white coupling at the end of the battery wires to remove battery from the headset
3) Connect the new battery to the female coupling on the headset
4) Secure the battery door in place once again and allow the headset to charge for 1 hour