My battery reads about 9.8V after sitting for a day or so, it turns over, but am curious if the coils require a certain amount of electricity to start the spark plugs. Or do I just need a new battery. It will start with a charger/jumpercables, alternator is fine. Battery just wont hold 12+ volts for long, paracidic drain might be the answer, but so far I wont diagnose that yet. There are no codes that are active.