Not what I wanted to hear

Had my spinal cord stimulator put in January 2020. Got rid of all my sciatic pain. Have been having ongoing troubles charging it. It is charged using the remote, which has a battery pack in, connected to a charging paddle. Seen my doc for a follow up 2 weeks ago. He is concerned with the charging troubles. Contacted Medtroncis, the manufacture, about it. They sent me a new charging paddle and remote but had me keep the old battery pack. Charging problem is getting slowly worse. Called them today to see about getting a new battery pack for the remote. They are sending me one. Was told that based off all the notes they have from the engineers about my charging issue that the problem is more then likely my device. Really do not want to get cut open again. The surgery is very short, it is the recovery time that I am not looking forward to.