Yes, as long as it is the correct voltage and fits and the positive and negative terminals are aligned correctly. However, just make sure you get a battery with at least as many CCA as the battery that came in the vehicle. You can go with a higher CCA battery but not a lower CCA.
If it is a sealed battery you do not open it. If it is not a sealed battery simple remove the caps.
Yes if it is a sealed battery. Even if it is not sealed it may still be good. connect it to a battery charger and see if it will take a charge.
A sealed battery, also known as a dry cell, cannot be refurbished. They can be recycled and should be disposed of correctly.
No, they are sealed.
Yes
Yes.
You don't, it is a sealed battery.
Sealed, basically for ever.
Nothing. The battery is sealed an no harm will be done.
Yes, but it is not as safe as a sealed battery.
It is a sealed bearing and can not be repacked.
it will have caps on it that you can remove.