brandy, what's different is the TT has a lot more parasitic power drains than your old popup.
therefore, if you only have one battery, it can be dead in just a few days.
the solution most do, is add a battery disconnect switch.
so you can just turn off the battery connection and the battery can sit, without drains for a long time without it being drained.
the other solution is keeping the shore cord connected to an outlet. this if fine but you'll have the same issue if you dry camp, without a disconnect switch.