I want to improve my front door lock

Has anyone ever used this or do you know about it?

Remote control, like a car. Were you pleased? When the batteries get weak, do you know if the door did not get looked? It uses iirc 4 AA cells. (With a car, one locks the door when he's finished driving so the car battery is allways strong.)

What about this push-button combination front door lock?

opinions on that? I'd have to lose the key and forget the code to get locked out

Or what about this one:

uses my fingerprint to let me in. I can't forget that. But does the model you have in mind recognize a fingerprint immediately or do I have to wiggle my finger and wait? (It also takes a key and a combination.) Again batteries, doesn't say how many. (THIS ONE IS FOR INDOORS BUT THERE IS PROBABLY ONE FOR OUTDOORS.