How To Safely Disconnect A Car Battery


The battery in your car is a vital component that provides power to start your vehicle as well as keep various electronic systems running. In some situations, you may find you need to disconnect the battery and even remove it entirely. Here's a handy guide to why and how to safely disconnect and remove your car battery.

Reasons For Taking Out Your Car Battery

Taking out your car battery can be a smart move in certain situations, but for the most part, simply disconnecting it should serve the purpose of preventing it from being drained while you're not driving the car.

The basic premise is that if you aren't driving your vehicle, the battery doesn't charge up again although certain electrical systems like the clock and on-board computer continue to use power from the battery to run. Over time, this will drain the battery if it's not started up and run every now and then. Some reasons why you may consider disconnecting and/or removing your car battery include:

  • Vacation or long-term storage: If you're going away on vacation for a few weeks and there won't be anyone to drive the car, you should disconnect the battery. The same applies if you are putting your car in storage. Read our guide on secure car storage here.
  • Work is being done: Whether it's mechanical work or bodywork repairs that need to be done, or in the wake of an accident while paperwork is being processed, if the process means the car won't be driven and it will be left standing for some time, it's best to disconnect the battery. Obviously, if mechanical work requires electrical systems to be operational, you wouldn't disconnect the battery and the car would probably be regularly started regardless.
  • Showpieces: Cars that are on display and will be left standing for long periods of time without being driven will also see batteries run down over time.

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