I had the same problem and my neuro surgeon replaced the medtronic with a boston scientific battery. I was very surprised it felt better and i felt it in my back and legs. Also it was easier to charge and the remote was wireless so i didnt have to reach around my back when i wanted to change the setting, turn it up or down. Also the reps were a lot nicer and really cared!! I am really not sure why my 1st doctor didnt offer boston. i had to go through 3 surgeries to get the right one. Make sure your doctor gives you the options and make sure you use boston scientific!!!