The problem is not in the battery because it will turn over .The mechanic should check the connections of wires and the ignition system.The fuses , rotor coil, starter and stater solenoid.Most of the time when an engine has been started and stop while driving . Is that the electrical circuit problem occurs .There fore those electrical parts that are malfunctioning should be check and if destroyed or worn out it should be replaced.then also look for loose connection of wires if there are then connect it .But try to double check the alternator. that can be where the cause of the problem is.
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The problem is not in the battery because it will turn over .The mechanic should check the connections of wires and the ignition system.The fuses , rotor coil, starter and stater solenoid.Most of the time when an engine has been started and stop while driving . Is that the electrical circuit problem occurs .There fore those electrical parts that are malfunctioning should be check and if destroyed or worn out it should be replaced.then also look for loose connection of wires if there are then connect it .But try to double check the alternator. that can be where the cause of the problem is.