The charging system may be faulty or you may have a parasitic draw. Its also possible that you have a loose connection, or you have an electrical and/or computer problem.
Dead battery? Loose or corroded battery cables? Blown fusable link?
A dead cell in the battery will cause this. Also, any light that is on pulling power from the battery. Another possibility is a stuck relay.
A car battery can shock you simply because it has stored energy and power. This is normal, but can be dangerous depending on if the person has built up a static charge.
Yes it can.
no
Low battery or power surge
Yes.
If you have power enough in your battery to start the car, then this is not the likely cause. Maybe the carburetor is in need of a proper rinse.
yes because the battery is what helps the car power most of the car.
No, You do not need a key fob to start a car. When starting a car, you put the key in the ignition and turn. Power comes from car battery, not from the key fob battery!
Dead cell in the battery or something is on pulling power from the battery. If it is a dead cell the battery must be replaced.
If the alternator fails, it is no longer keeping the battery charged and your engine is running on nothing but battery power. Once the battery runs down, your engine will no longer run.