I completed this battery replacement in just over and hour. I didn’t have the iOpener heating pad so I used a hand held hair dryer. Worked fine. It’s not necessary to get the ipad really hot, just warm up the glue so it comes off fairly easy, just take your time with it. There were at least 3 more connections on my ipad that weren’t on the instructions. I have the wifi/Cell version, so I suppose that was the difference. Ipad is now like new again. I replaced the battery because it was bulging out. I was using this ipad for a smart home and kept it plugged in all the time. That is a bad idea. I now plug it in only once in a while.