How do I charge my headset battery?

Your headset does not have an internal rechargeable battery.

For best performance, use only AAA Alkaline or Lithium replacement batteries with the H300.

To replace the battery:

1. Open the battery door at the back of the headset.
2. Remove the old battery, if necessary. 
3. Insert a new battery so the (+) and (-) markings match the ones in the battery compartment.
4. Close the battery door.