Start car after few hours needs jump start

It sounds very battery related like the battery is on the way out, but start looking at the easy things first.

Clean the top of the battery and the terminals with a solution of hot water mixed with a tablespoon of bicarbonate of soda.
This will neutralize the acid.

Rinse with clean water and dry the area.

If your radio has a security code obtain this first before proceeding with the next steps.

Remove the negative battery terminal (black) and thoroughly clean the battery post with sandpaper or wire brush, and then the terminal itself.

Repeat the same for the positive terminal (red).

Be careful not to join a circuit between the two terminals with a metal object.
NEVER test a battery's level of charge by jumping the terminals together with a screwdriver or similar to see if it sparks, it will mostly like ignite the Hydrogen gas in the battery and explode.

Check the electrolyte levels in the battery if this can be checked, and top up with distilled water if necessary.

Charge the battery overnight with a borrowed or bought battery charger.

If you have a voltmeter check the voltage with the battery fully charged and disconnected from the battery charger, it should be at least 12 volts DC.

Start the car and check the voltage again, it should be greater than 12 volts, usually around 13 volts DC or a little higher.

If the issue still occurs after this take the car to an auto shop that has a decent battery analysis machine, and they will also be able to test if the alternator is outputting the correct voltage and the regulator.