Now this is the ways I like things to work! Battery already installed, just pullout the separating plastic tab and it works right away. There are no codes to enter and nothing to register. Point and click. Worked perfectly. I was so excited (and terrified I might drop it into my coffee cup again) that I ordered a backup to have on hand just in case. Well....you never know. And what if they stop making it and it can't be refurbish (which I don't want anyway)! Yes, I love redundant systems and upgrades. And now I love this Company.