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Plantronics C054A Genuine Replacement Battery for CS540
Genuine Plantronics CS540 Replacement Battery
If your headset base shows Plantronics C054A this is the battery for you.
Compatible with:
- CS540
A GENUINE battery has 84479-01 or 84479-11 printed on it.
A new battery provides up to 7 hours talk time after a 3 hour charge.
For best performance, it is recommended that these batteries be replaced every 2 years.
Or, as soon as you find your headset running out of charge too quickly.
Low Battery Warning
If you are on a call and the headset battery is critically low, you will hear a repeated single low tone every 15 seconds indicating the battery is low. You should recharge the headset immediately.
If you are not on a call and press the call button, you will hear three low tones if the battery is critically low. You should recharge the headset immediately.
Replacement Guide
To remove the battery:
- Slide the battery cover off and remove it from the headset.
- Pull the battery out of the attachment clip.
- Grasp the battery connector and disconnect from the headset.

To install a new battery:
- Plug the new battery to the battery connector.
- Once connected, slide the battery into place.
- Slide the cover back on and push it into place.
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