Re: Smartlock Remote Issue...Is it Battery?
Colud well be the battery, if you don't know how old it is you may as well put in a new one.
Could also be a bad connection between the battery and terminals, my remote has done that to me, had to give it a whack sometimes to get it to work. Open it up and make sure you have a good connection by removing the batt, bending the terminals in a bit, then putting it back together.
Hope this helps you!