Battery draw - How much it too much ?

I have no proof just yet, but I'm curious if I have a constant draw on my battery while the car is not running and Key-off/removed.

I understand items like the radio clock and Memory in the computer require a constant supply of voltage to maintain their settings.

Do you have any idea how I could determine "IF" I have a potential short which is resulting in an additional draw ?

I typically use a trickle-charging because I don't want to get stuck when I do take the car out.

Apologies to the forum --- I should have done a search before submitting this recent post. There is already a lot of good information and ideas.

If I could delete this post, I would....