Key Fob does not work

[SubaruDips]

Hello folks. I've just tried to unlock my car using the key fob and its not unlocking the car.  I can unclock the car using the key.

I was thinking maybe the Battery in the key fob has finally had it. If it is the Battery is it an easy fix?

Any suggestions?

[Mr B]

Battery would be easy & cheap for quality cell if pull old one & match cell number on eBay

[Gambit]

As said above the Battery would be my first place to start. :)