Cs55 headset won't charge

light is not flashing only red light is coming on charging from last two days

On your base there are the numbers 1-4. Put the # 1 in the 3 O'Clock position like a clock. Try putting the letters that are in the bottom on B.

Good luck from Headsets Direct - 800-914-7996.

I know this is an old post but I just want to share what I confirmed through Plantations. Hopefully it will help someone in the same situation. Sometimes, people buy replacements headsets and it should be noted the CS55 Headset does not pair with the CS50 base. While they headset looks identical, the only way to tell which headset you have is to open the battery cover and look under the battery. If you have a CS55 headset and a CS50 base, they will not pair.

You can use the cord part number 78333-01. (I have included the link.) This will replace the cord that is plugged in between your CS55 charging base and the handset jack on your phone. It will plug into the base of the CS55 and the round headset jack on your phone. You will not have remote answer. Push the headset button on your phone and then press the headset button on the CS55 headset.

Good luck from Headsets Direct!

try doing a system reset press the call control button and the volume mute button at the same time for 5 seconds. when the talk indicator light blinks release both buttons. press the call control button again and the talk indicator light will blink again briefly headset is back to normal then unplug the charger from the charging jack for 5 seconds and plug back in headset is reset. if that doesnt work then replace the battery in headset.

We're had customers call with similar issues. First, make sure your compatibility dial is set properly (located on the side of the base). If set incorrectly, it will make your headset inoperable. If that doesn't fix your issue, try disconnecting and reconnecting the battery and then perform a subscription. Both steps can be found below:

How to Replace your Plantronics CS55 Battery
How to Subscribe your Plantronics CS55 Headset

Good Luck from Headsets Direct!

Just wait for the battery to be completely drained-I did that to mine just now.after the battery is completely drained, I charged it, and it began functioning again.

On the CS55 headset itself, right below the speaker that sits on the ear is a cover that can be removed.  Inside is a small special battery.  The battery life tends to last about 3 years, and at that you should be getting 8 - 10 hours of talk time.  Once it's decreased to about 4 hours of talk time in a day, it's about time to replace the battery.

If the Plantronics CS55 wireless headset shows that it is on, you have to make sure of the following things.

a. the green LED on the base turns on when you turn the call switch on from the headset.
b. the small green LED on the side of the headset is blinking.
c. the telephone headset is lifted from the cradle.
d. if the headset is not charging and the Amber light on the base does not blink when you place wireless headset on it; trying placing the headset more firmly.
e. If the headset is not charging and the Amber light on the base does not blink even after placing the wireless headset firmly on the charging cradle, you may need to change the battery.

Alternately you can try resetting the Plantronics CS55 wireless headset.

Reset Plantronics CS50, CS60 or CS55 Wireless Headset

If you have problems with the sound or connection of your Plantronics CS50, CS60 or CS55 wireless phone headset, you may want to try to hard reset it using the following steps:

Note: Ensure the IntelliStand switch (on the right side of the charging base) is in the - position and NOT the = position.

1. Press both the call control button and the listening volume/mute button for 5 seconds. When the indicator light blinks release both buttons.

2. Press the call control button again. The talk indicator light will again blink to indicate the headset is back to normal.

3. Disconnect the AC charger from the AC charging jack for 5 seconds.

4. Reconnect the AC charger.

Now give the Plantronics headset a try.