Chosen Solution
When i connect or not connect my phone tp charging it heats and use more battery
More than likely the motherboard of the phone has been damaged. This is usually due to water damage corroding the components. It is not safe to use a phone that heats up like that, especially if the battery is heating up. I would disassemble the phone and examine the charging components for corrosion or other damage.
my first guess was water damage also.
