How would I fully secure my bios password/other settings from being reset/breached by pulling the battery out or by other means?
Sorry - there is simply no (electronical) way to protect the bios against pulling out and put back in the battery. Thus there is no way to protect the password and the settings against erasing, if the attacker has physical access to the PC. But a broken bios password is not the end: you have to encrypt the whole disk to secure the data against being stolen or altered (but not against erasing, for this you have a - encrypted - backup to be safe). There ist just no other way against attackers with physical access.
A bios password is usefull to prevent the hidden stealing of passwords or data through secretly booting the pc from a live-dvd or bootable USB-Stick (e.g. http://www.komku.org/2013/02/how-to-reset-windows-7-password-step-by.html), if the PC is sealed or like this.