Reasons for Dead Battery - Service Information at Shingle Springs Subaru

If you try to start your car, but only met with a click or no noise at all, the battery may well be dead. There are many reasons this could happen, and some of them are benign. For example, you may have left your headlights on overnight by mistake. A simple jump and enough time to let the battery recharge should fix this. However, if the battery keeps dying, it's likely due to another issue. At Shingle Springs Subaru, we want to help you stay informed about important things that affect your vehicle. With that in mind, here are five potential causes of a battery that keeps dying.

Corrosion on a battery's terminals can cause a poor connection

5. Bad Terminal Connections

The battery terminals connect the battery to the rest of the charging system, allowing it to get the power it needs. If the terminal connections are bad, the battery won't be able to recharge as it should. There are several signs of a bad connection, from loose cable clamps to excessive corrosion in the terminals. Fortunately, these things are pretty easy to check for yourself. If you don't see any evidence of a bad connection, it's likely due to one of these other causes.

 
A faulty alternator will fail to recharge the battery as it should

4. Extreme Heat

If you've lived in the area for a while, you may know that it gets kind of hot here. While cold weather can make a battery seem more sluggish, intense heat can actually be worse! High temperatures can actually cause some of the fluid inside the battery to evaporate, draining its ability to charge as well. The interior can even begin to corrode under excessive heat. Because of this, it's best to try to park your Subaru in a garage if you can. Even if no garage is available to you, try to park in a shady spot.

3. Parasitic Drain

Parasitic drain, also called parasitic draw, is what happens when too much electrical power keeps being used after the engine is shut off. A small amount of power drain from your car battery is actually normal, since not everything shuts off completely when you turn off the engine. This small parasitic drain allows the clock and radio settings to remain among other things. However, a short circuit or other electrical problem can cause an electricity-using component in your car (like an inside light) to remain in the "on" position, even if the light itself isn't on. This can cause excessive parasitic draw, which may negatively affect your battery's charge level.

A battery that's near the end of its lifespan will need to be replaced

2. Charging System Problems

The battery is a key component of the charging system, but it's not the only component. Just as important is the alternator, which recharges your battery by generating and sending electricity its way. If the alternator has died or is near the end of its lifespan, it won't be able to charge the battery as fully as it should. If it's not the alternator itself, the wiring in the charging system may be to blame.

1. The Battery Is Nearing the End of its Lifespan

The battery inside your Subaru is designed to be rugged and long-lasting. However, even the best batteries don't last forever. Generally, you can expect to get five to seven years of service from an automotive battery (though, as we mentioned earlier, excessive exposure to high heat may make this shorter). If your battery is dying, the best thing to do is to replace it. At Shingle Springs Subaru, we have a great selection of new batteries designed specifically to fit your Subaru.

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Shingle Springs Subaru

4045 Wild Chaparral Dr
Directions Shingle Springs, CA 95682

  • Sales: 530-677-8771
  • Service: 530-677-8771
  • Parts: 530-677-8771