Battery becoming very hot

Good evening all. Finally had some time to perform the voltage tests. Battery off 12v. Turn on car Volts 14.3 at Battery and 14.17 at Alternator. Disconnected VR ammeter went to the center. Checked all the grounds and cable to block ground as well. All paint taken off the firewall as well. Ammeter still half way to the C side. Lights turned on brakes pressed needle goes to the C. Still a mystery but I know soon it will be resolved. Thanks