Hello everyone heres a short video on how to change the battery on your key fob this video demonstrates a mazda 6 fob but should work for most just make. Http wwwcavaliermazdacom a quick tutorial on how to change batteries in mazda key fobs. Replacing the cr2025 battery in your mazda key fob is a cinch all you need is a small flat head or pocket screwdriver a replacement battery from your local. Amazons choice for mazda 6 key fob battery energizer cr2025 battery 3v lithium coin cell 2025 batteries 2 battery count packaging may vary 47 out of 5 stars 27036