A fully charged S9 battery provides approximately: Up to 6 hours of stereo music listening/ 7 hours of phone call talk time. Up to 150 hours of standby time. Your S9 powers off after one hour if not in use (no audio or control activity).
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How can I extend the battery life of my Bluetooth headset?
How to charge S9 wireless headphones?
Up to 150 hours of standby time. Notes: First Time Use — Before you can use your S9, charge its self-contained battery for two hours.
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The more you use your S9 with your Bluetooth devices, the less standby time your battery has. The rechargeable batteries that power your S9 must be disposed of.
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