Do you password protect your Bios?

[Elektrisk]

Take a look at the motherboard in your computer, on it somewhere there will be a circular battery. Now the memory that is used to hold your BIOS settings is volatile (think of RAM, that's volatile memory, once it loses power anything in it is lost), because of this it has to have a constant small supply of power in order to make it non-volatile when the mains power is switched off. Once this power supply (the battery) is removed or dies in some way, all your settings are lost so when you next start your PC it will use the factory default BIOS settings.

Thanks a lot. That makes sense.
So, would removing the battery and putting it back in be fine, or would you need to replace the battery with a different one? Or, can you remove the battery and start your PC that way? Or does it need the battery to start?