I'm looking for a padlock for my suitcase/bag zippers.

I prefer a lock that doesn't require a key (because I may lose the key or it may be stolen). I think that leaves me with just a few options -- those three-dial or four-dial locks. (Are there other types of keyless locks that I’m not aware of?)

The lock will not be going on flights, and therefore don't need to be TSA-approved.

A luggage on a flight will be with airport staff for only a few minutes, so a lock that can keep from being guessed for 5 minutes is good enough. But in my context, that isn’t good enough. In my situation, a bad person may have the opportunity to spend 10-15 minutes per period. And may have many of these periods. It is therefore important that a bad person can’t go through all possible combinations in an hour.

And I strongly prefer the ability to change the password whenever I want.

I don't care if the lock is heavy or big. It just need to be fit through the zipper’s holes.

Yes, i realize that a bad person could just use a knife to cut through the body of the bag/suitcase. It’s a long story, but in my context, this is not a concern.




PS. If you know of a dual-loop cable (like this https://i.imgur.com/KPPhCph.jpg) that can fit the width of a regular-sized padlock (like this https://i.imgur.com/k0z37N3.jpg) but is slender enough to fit thourgh the holes of zippers (https://i.imgur.com/VdFw9N2.jpg), I’m open to hearing about them. The dual-loop cables I’ve come across are either

a) Have loops that are big enough for regular padlocks but too fat for zipper holes
Or
b) Slender enough to fit through zipper holes but loops are too small for a regular padlock