Plantronics Spare Battery CS510 & CS520

This product has a replaceable battery.  To ensure replacement batteries meet Plantronics high quality standards and for optimal performance, only use replacement batteries provided by Plantronics. Talk Time

With a single full charge, the CS510/CS520 will provide up to 8 hours of talk time.  Talk time will be reduced when operating in wideband mode or if the headset is used consistently at a far distance from the base.

Low Battery Warning

If you are on a call and the headset battery is critically low, you will hear a repeated low tone every 15 seconds indicating that the battery is low.  If this happens, you should recharge the headset immediately. If you are not on a call and press the call control button, you will hear three low tones if the battery is critically low.  You should recharge the headset immediately.