Getting hot very much and battery getting over soon

That's not good. Something is getting way to hot. Do you experence the said issue with the battery removed? I would suspect the battery as well. A capacitor, PSU? I would take it to a qualified computer tech A.S.A.P. It COULD be a fire hazzard. Have you GOOGLED the problem or searched the ACER website for recalls of the battery? The fan will run as soon as you boot, but when the laptop gets to a pre determined temp, say hot, the fan spins at a faster rate. That would be normal. Also, are the fan and vents free of dust? Is the laptop getting sufficent air flow in and around the fan and vents? Does it happen at a certain time or place? Perhaps a Laptop Cooler?

Hi,I am afraid you have a malfunctioning battery..
while charging it is normal to be warm but not hot.
since your battery can not charge it gets hot..
I recommend you to take it to service as soon as possible ask for test
and than replacement of battery..

Hope this helps! Take care and please Remember to rate/vote and
give me 4 Thumbs Up for me to continue for Helping out the Community :)
Thanks

If the internal fan is working, you should sense air moving in or out of vents. If it isn't working, the unit will soon die if the fan is not replaced.
You may need a cooling pad under the unit such as are shown here:
Cooling pads
If they are powered by the laptop itself (via USB for example), they will shorten the run-time of the battery.

It may well be that the battery that's being charged is getting past its sell by date. They only last for so many charges. easy way to find out is remove the battery, connect the power supply, and if the charger power supply doesn't get hot (usual to get warm) then its your battery. It is perfectly okay to use the laptop without the battery installed on the mains.

I think it is problem with your power cord

you should get it replaced soon so that your battery does not get short

it is the issue with the processor please consult the manufracturer for the replacement of the processor or soon the computer will boom

Yes it is possible to solve it. When your laptop is very very hot, then you better check to a Computer Technician to see any trouble such electric ground signal, fan failure of motherboard short circuit.
And you say about the battery it don't matter also because battery give only power supply in accurate rate at the time your Laptop is working until now.
It cost maybe minimum charge on the Computer Technician favor.

Laptop batteries do get warm when they are in use or charging but not so hot to cook eggs.
This is dangerous and it could explode and catch fire.There could be a problem with the charging circutry or a faulty battery. Get it checked out.

Problably the battery is damaged. Check if i thappens when you are running on AC power with the battery removed.