The video and explanation were perfect. Only had three challenges: 1) removing the cover is a bit of a challenge and one has to work at it, but you will overcome with patience and working around the edge per the video. 2) Removing the battery wire was straightforward; however, my wire was taped down near the connector. So, I had to carefully remove the scotch tape before disconnecting. I did not put the tape back when reconnecting. 3) Removing the old battery was the toughest of all. The sticky tape holding the old battery is really sticky. The provided tool couldn't lift the battery. So, I used a dinner fork and starting on one edge, carefully began prying up the battery. If you listen closely, you'll begin to hear the tape release. Continue exerting just enough pressure to keep the tape releasing, and soon the batter will release fully. Be careful with the pressure. You will see the lid holding the battery bend a bit. Don't overdo the pressure.