How to replace the battery in your Aston Martin glass / crystal key

When I received a warning message in my Aston Martin DBS that the battery was running low in the back up key fob, I decided to replace the one in the glass key at the same time. This video takes you step by step through the process to do this yourself. This process should be the same for the glass key for the DBS, DB9, Virage, Vantage and Rapide. I hope you find this helpful! Please share your experience, questions and observations in the comments!