Completed battery replacement over two days. Everything is working. The carefully worded procedure, although sufficient, is not for the faint of heart! Patience is paramount. Adhesive, 'foam rubber' seals, silicone over battery pads, and odd-shaped speaker and other components provided added challenge for me. I made good use of additional items: 7X fine tip tweezers, Exacto knife, plastic dental pick, additional tiny screwdriver, solder wick, Kapton tape to provide extra layer of insulation over new battery pads, and OptiVisor to accommodate my 66 yr old eyesight. Without these instructions, the battery replacement would have been near impossible. Thanks.