I took the key and manually unlocked the door.

I recently saw a distraught young lady weeping beside her car. "Do you need
some help?" I asked.
She replied, "I knew I should have replaced the battery in this remote door
unlocked. Now I can't get into my car.
Do you think they (pointing to a distant convenience store) would have a
battery for this?"
"Hmmm, I dunno. Do you have an alarm, too?" I asked. "No, just this remote
'thingy,'" she answered, handing it and the car keys to me.
I took the key and manually unlocked the door.