What should I do if the battery is put away in Fuji Polaroid mini7s?

Put it away. How long before you shoot? If it's really a long time, about half a year, be sure to put the battery away. If you don't have a battery, you don't need to bring it. If you are worried, you can take it out. It's convenient to put it back anyway.

As for photographic paper, you must not take it out, especially if it has been taken. Once it is taken out, it will definitely be completely exposed. This must be paid attention to. In addition, I personally suggest that it is best to wrap it with a cover to prevent things like lenses from entering the dust. There is also moisture-proof, sun protection and collision prevention. There is no problem with this concern.