When I saw the surgeon last week, he said the battery for the addaptive interstim. lasted five years. I am guessing that he is assuming this is because you buzz 24/7 with the device making the appropriate adjustments as one changes position or activity. I, too, will be a butt buzzer. The belly is totally off limits in his opinion. All of my weight gain has been in that area. He believes that once I am up on my feet, standing errect and walking again, the core will begin to strengthen and the belly will become smaller. My posture is currently rather bizzare due to compensating for the pain when in an upright position. Looking forward to lots of postive changes in the future.