Battery

Battery drain, even disconnected

Battery drain, even disconnected
  • 2500
  • John Lloyd

If you disconnected one battery terminal and it still “drained”, a sneak circuit is probably not the culprit. ... Many batteries have no cell caps so you might not be able to tell. One bad, or weak cell can kill the whole battery. Go to an auto parts store that checks battery condition for free and have it checked.

  1. Will a disconnected battery discharge?
  2. Why does my battery drain even when not in use?
  3. Can a battery drain with the negative cable disconnected?
  4. Will car battery lose charge when disconnected?
  5. How long can a battery sit disconnected?
  6. How long should battery be disconnected to reset ECU?

Will a disconnected battery discharge?

Disconnected either terminal will prevent drain, as stated already. A battery tender is another safe way to maintain the battery.

Why does my battery drain even when not in use?

Why is my phone's battery draining when not in use? Even if you are not using your phone, there are certain processes running in the background that slowly drain its battery, which is normal. Also, if your phone's battery has become old and worn out, it is likely to drain faster.

Can a battery drain with the negative cable disconnected?

Can a loose negative battery cable drain the battery? ... They can prevent the battery from being charged, properly which will look like the battery is being drained. Loose connections will also prevent electrical systems from operating properly. A loose battery terminal will not allow the battery to charge properly.

Will car battery lose charge when disconnected?

That said, the self discharge for healthy battery is quite low, and the battery will have enough charge to start a car even after 6 months. Disconnecting the battery leads, will ensure that the battery does not discharge due to any connected load.

How long can a battery sit disconnected?

When the battery is removed, it can stay for six weeks to 6 months. However, you need to keep recharging the battery over time. Ideally, the battery should be recharged every 12 weeks when the battery is disconnected.

How long should battery be disconnected to reset ECU?

Disconnecting the battery for a short time may not do the trick because the car's computer, or ECU, still has some current in it. Waiting for over 15 minutes after disconnecting the engine will help ensure the equipment is reset.

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