Since the car battery is the centre of a car’s electrical system, a dead battery will bring all systems to a halt. You won’t be able to start the engine nor will the headlights, radio or interior lights function. The most obvious signs of a dead battery is when the car won’t start. After parking for a while, the car just makes a labored “rrr rrr” sound or even worse, a click with nothing is up. The battery may die if something electrical was left on while the car was parked, either headlights or something less obvious like your stereo. Below are some signs
1. Low Charge
If the charge is low, the horn may sound weak, the headlights may be less bright as before, and some things may function while others don’t. If the battery is completely dead, the car is going nowhere.
Jumping a battery from another vehicle or portable battery will only be successful if the battery was dead. If jumping works, a dead battery was the issue.
The smell of acid or burning from a battery indicates that it is dead or may need to be replaced.
A battery maybe dead because the alternator has not been recharging it. In this situation, jumping the battery won’t last long because the charge will drain again almost quickly. The alternator needs to be replaced.