Hi Wakegirl,
I have a MedTronics cerv. implant for quite some time now. I have had success with it. I have been in remission for close to 3 years now because of it. Everyone once in a while, it will rear it's ugly pain, and I just turn the SCS on for a few hours.
Anyway, I rarely use mine and had the battery checked a few month ago and I have still only used only 20% of the batteries life. But I rarely use it anymore.
Take care....if you have any questions or anything, let me know