It sounds like the alternator is bad. If the alternator is bad the battery will not hold charge when running
no a egr valve would not make a dead battery. a bad alternator or maybe a bad connection post to battery would make it die ,
No, that will have no effect on the battery.
Batteries not connected properly Dead car trying to draw more current than the "helper car" can produce due to weak battery or alternator
Its battery could die and the engine would stop running. Or a cable plug could have been unplugged and the car would stop, the only real reason it would do this is that the car would hit a large bump or halt at a sudden stop.
The alternator is not working properly. Your car will still run off the battery for a little while then when the battery dies the car dies. Check the alternator or take it to autozone and they will check it for you.
old age .just a year is enough.
Something is on pulling power from the battery. Can be any light on the car or a stuck relay.
Something causes a slow drain on your battery. As it does, your battery slowly discharges. If you know that your car will be not used for several months, you might try disconnecting on of the battery terminals.
If you explode you die and the same applies to a car battery.
Dead cell in the battery or something is on pulling power from the battery. Have the battery tested at any auto parts store.
with darain