quick question about the power problem

[Robert & Teri Rahn]

Hello,

Got one more question for everyone please. Why is it that nothing that
is 12v or 12v/120v both works? I understand the part about the
batteries being possibly shot, but it has been plugged into shore power
the whole time and still is. Do these items run off of the batteries
even when you are plugged into shore power? It seems to me that if you
are plugged into power everything would work.?.....Just curious to know
the answer. Any imput is greatly appreciated!

Thanks again for all your help. Robert has been having fun.

Teri Rahn
Kalispell, MT