Why Is My Car Battery Draining Overnight. A simple test to help you find why your car battery is always dead in the morning. If the car is left parked in high pedestrian traffic areas this could be a problem.
A failed diode in the alternator creates a closed circuit that drains your battery even when the engine is off. Because something is draining it or it isnt getting charged by the charging system. This can cause your iPhones battery to drain overnight when you use any such app on your iPhone.
Today three weeks later same thing again total electrical failure.
A short circuit may cause excessive current draw and drain your battery. If the car is left parked in high pedestrian traffic areas this could be a problem. Try turning off Location Services on your iPhone to save some overnight battery life. What does it mean when your battery drains overnight.
