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Do I need to disconnect my battery if I am not using my car, 2000 Volvo 2.4T Estate - Automatic, for a few months?

I have read that to disconnect the battery is a bad thing to do as it will mess with the electronics.....If I can disconnect...what is the procedure? Regards, Patrick.

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You could attach a trickle charger to keep the battery replenished

Posted on Apr 01, 2015

Testimonial: "Do you know the procedure to discontent and reconnect the battery?"

  • Johnny Tetmo
    Johnny Tetmo Apr 01, 2015

    Switch igniton off then just remove the negative battery cable first, then the positive. And make sure it doesn't make contact with any metal of the car. Reverse the order when connecting again.


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The battery will eventually lose charge over a few months - depending on it's age and condition.

If you can get someone to turn it over once a week or so, that would be a better idea.

Even if the battery is removed, it is likely to have lost its charge by the time you come back to refit it. You will need either a jump start with cables, a booster pack or a battery charger.

Just be aware that an older battery may need replaced if left disconnected for a few months. If your battery is more than three years old, remove it but buy a new battery when you come to use the car again.

It's true that no battery might cause the alarm system to need resetting. Have a word with a local mechanic for advice. They are always knowledgeable and far less expensive than a dealer.

Posted on Mar 30, 2015

Testimonial: "Do you know the procedure for disconnecting and reconnecting the battery?"

  • MatchstalkMan
    MatchstalkMan Apr 01, 2015

    You will need to locate the battery. It's usually under the hood/bonnet. There are two connections, a positive (+) usually coloured RED and a negative (-) usually coloured BLACK. You will likely need a pair of wrenches/ring or combination spanners that fit neatly over the nuts on either side of each connector. Vice/mole grips can also be used if properly adjusted. Do not use pliers as they may slip and cause injury to you or damage to the nuts. If the nuts are tight, spray on some penetrating fluid like WD40 and allow it to work for about 10 minutes. Being careful not to make contact between the (+) and (-) terminals with a wrench or spanner, carefully set the wrenches on the nuts either side of the (-) connector first and loosen the nuts in a counterclockwise/anticlockwise direction. You do not need to fully remove the nut and bolt, just make then loose enough so that the connector can be slipped off the battery terminal. Repeat this procedure for the (+) terminal connection. You may also need a spanner or screwdriver to loosen a clip that holds the battery in its tray. Take care when removing the battery as it is quite heavy. Be careful setting it on the floor as the case may be damaged it drops suddenly. This will release dangerous acid used in the battery housing. If the battery is going to sit for a long time, use electricians tape to wrap each battery terminal so that a short circuit between the terminals is avoided. A short circuit will lead to very high temperatures being created in the battery which may cause it to explode. Finally, when it come to refittting a battery, do everything I mentioned but in reverse. Connect the (+) terminal first. Use some petroleum jelly to reduce the possibility of the terminal blocks being affected by oxidation. Hope this is clear.

  • MatchstalkMan
    MatchstalkMan Apr 01, 2015

    One last thing, if you have a bad battery and you are replacing it, please dispose of the old battery at your local recycling centre.


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The best thing is to remove the positive cable from the battery then negitave. If the battery is underneath like mine is simply disconnect the positive cable and

Posted on Apr 01, 2015

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