The battery has a thermal resistor in it that is used to prevent charging a too-cold or too-hot battery. Most likely, the water seeped into the shell and has damaged/shorted the probe. It is possible that the phone’s charger circuit is damaged, but less likely. The battery charging circuit needs the temp to prevent exploding the battery, so disabling it is unwise. You might be better off just replacing the battery. You can try the bag of rice for 48 hours to suck more moisture out.