The Honda line of key fobs. Honda has had just 6 major key fobs over the years. They have two integrated smart keys where the physical key and the fob are one and the same. Then they have 4 smart key fobs that with various buttons allow you to lock/unlock and/or start the car, open the trunk, etc.
1. The Integrated Physical Key with Rectangle Smart Key Buttons
2. The Integrated Physical Key with Rounded Smart Key Buttons
This is the battery for the integrated physical key with rounded smat key button Honda key fob: