Is there a place to get Honda 2010 CRV key battery [View all]

replaced that doesn't charge under $150? I had a key stolen 5 years ago and it cost me $450 to replace it. I expect that the current price is much higher. I saw on You Tube that you can order a battery through the internet and do it yourself. I am pretty handy and have tiny screwdrivers but will this solve the problem? I think it is the battery and I hope it is not a whole key replacement. Should I go to a wristwatch battery place? Should I attempt it myself. I am LOW income, live alone and $$$ is a big factor.

I got scammed a week ago and I wish I had asked the DU professionals for tech advice so now I hope I get advice before I trust any tech stuff (which is Greek to me).