Is there a place to get Honda 2010 CRV key battery

[BigmanPigman]

14. I'd like to do this

Since a replacement key with an alarm is over $400 and I only have the spare with no alarm/fob and one with a working alarm. I discovered that my car wouldn't start yesterday when I had planned to buy a battery at CVS for the key. I charged my car for about 15 minutes last night and wondered if my suddenly dead car battery had anything to do with the key not working. I tested it out before my car battery was fully charged and the key's alarm works!

I watched this video and I want to do that! I want my spare key/alarm again but looking at the video I wondered how he got the key cut for his specific CRV. I can buy one like this and program it myself and save several hundred dollars but the key he got from Amazon doesn't appear to be cut along the edges like all keys do. Am I missing a step?