New to corny kegs questions II

Okay I have my first corny kegged and under pressure (10PSI). Now when I brew up another batch can I after several week unhook my carbonated keg and hook up to my new 2nd keg?

So I make a T connection so both kegs are under pressure?

I guess my question boils down to, if my first keg is carbonated, does it need to be connected to the CO2 tank all the time or if it retains pressure can I leave it un-connected?

Once fully carbonated. You can disconnect the gas for storage or to charge a second keg.

I recommend a t-splitter so you can charge multiple kegs at once.

If it retains pressure you can disconnect it and let it age while carbing up another brew. When it's time to serve you'll want to hook back up to the co2 for dispensing. Another thing to bear in mind is that your temperature will make a difference 10 PSI at 40 degrees is about like 30 PSI at 60 degrees. If you're carbing the new beer outside the fridge, adjust accordingly.