Yes, you should know more! The low frequency stimulators like Boston Sci. don't need to be charged often but I was told I would always feel a tingling. With a high-frequency one, like Nevro, you have to charge it every day or two but you feel nothing. The newest one that was approved in Jan. '18 is smaller than what I have. There are 6 or 7 makers of this type of equipment. You should be making an educated decision. PLEASE review the websites of them all and talk to people that don't have a stake in what you're buying. You also need to know about who's doing the implant and if it's leads or paddles. Paddles require a laminectomy, more painful and longer recoup. time. Also, I was told that, with leads, you can have an MRI but not with paddles. In fact, I'm having one on Monday. I'm no expert so do your homework!