Is it normal that...

[xBlueXFoxx]

Then you don't know much about memory, memory stays. I even did this to my MP3 player once, it wouldn't start.
But after removing the battery and letting it just lay there for a few hours cleared it's internal memory and there we go again.
It works for mobiles displaying the battery wrong and even electronic speed meters displaying speed wrong.

Once a PC is powered down, the memory clears instantly, if you're referring to the BIOS/CMOS in which removing the battery from the motherboard, unplugging it and pressing the power button would discharge any remaining power within your system. Thus making the small amount of saved data in your bios reset, causing your bios to be restored to default settings. In this case, RAM does not work the same, turning off your PC, or restarting your PC, clears what your RAM caches.

MP3 players work the same, but you can't discharge them like a PC, you have to wait awhile for the existing power to slow dissipate.