If you’re Plantronics CS55 wireless headset doesn’t hold a charge like it use to, it’s probably time to replace the battery. It’s not the easiest thing to do, but with our guide and pictures, we can walk you through it and have you up and going in a few minutes.  Click here for steps.

1) If your partner phone has the auxiliary jack on the bottom, you can plug the CS55H directly into that jack and it’s now an extension of your phone like the CT12, except no key pad. You are free to answer/end your calls away from the phone. All other phone functions (except muting) have to be done at the phone.
2)The CS55H also comes with a splitter so you can have them both come out of the wall jack in parallel. It will function the same way as if you plugged it directly into the phone as noted above. this setup will work with Partner phones without the auxiliary jack.