$2 Battery you need - https://amzn.to/2SyQRiP

Hands-Free Fob from a 2009 Night Rod
You will need 1 ENERGIZER CR 2032 3V BATTERY

Here is a quick little video on how to change the battery on this HD key fob. Enjoy!

FCCID: L2C0028TR
Interchange Part Number: 3432A-0028TR
Battery Size: CR2032

Part Number / FCC ID / Canada
HARLEY_L2C0028TR
IC 3432A-0028TR
FCC ID L2C0028TR

PROXIMITY REMOTE