ezhang profile image 77

Does it really kill your car battery to jump someone else's car?


I heard that you may be doing harm to your own car's battery by helping someone jump start their car. Is this true? Why would that be the case?

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LuisEGonzalez profile image81

Luis E Gonzalez (LuisEGonzalez) says

5 years ago
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  • Joel Mauldin profile image

    Joel Mauldin 2 years ago

    Some of this is not true. The ground of your car is directly connected to the ground of your battery. There is virtually no difference between connecting to the ground of your car or the battery terminal. Run the car engine to avoid "feedback".


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CloudExplorer profile image82

Mike Pugh (CloudExplorer) says

5 years ago
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  • Doug Cutler profile image

    Doug Cutler 11 months ago

    I blew the top off one when testing a starter from another car.

    My car was running and charger my battery when I put the starter next to it and jumped the starter. It sparked and exploded the hydrogen that was accumulated in the battery..

    Now I wait!

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Barbara Anne Helberg (Barbsbitsnpieces) says

5 years ago
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Anna Marie (annajazz) says

3 years ago
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Don Colfax (tehgyb) says

2 years ago
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Richard Brown (richardbrown81) says

3 years ago
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Brian (ibbarkingmad) says

5 years ago
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Borsia says

3 years ago
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C E Clark (Au fait) says

21 months ago
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Sandra M. Urquhart (Etherealenigma) says

5 years ago
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Tim Mitchell (tsmog) says

3 years ago
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YvetteParker says

13 months ago
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  • Doug Cutler profile image

    Doug Cutler 11 months ago

    There is an issue about the diodes in the alternator going out it you do it wrong. Like, if you put a good battery in, start engine, leave running, remove good battery, put back in discharged battery. The "no battery time" can damage the diodes.

everythingbike profile image85

Peter (everythingbike) says

19 months ago
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  • Shyron E Shenko profile image

    Shyron E Shenko 4 months ago

    Peter, if a car is running and you disconnect the battery then the motor will stop running.

Dakk profile image91

Guilherme Radaeli (Dakk) says

17 months ago
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Kate McBride (Kate Mc Bride) says

2 years ago
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Shyron E Shenko says

14 months ago
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Jafar (herbalists) says

2 years ago
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BigBlue54 says

21 months ago
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Mechanics Guy (mechanicsguy) says

7 months ago
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Didyoueverwonder says

5 years ago
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jchaney says

5 years ago
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JG Hemlock says

10 months ago
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Twila Nelson (twilanelson) says

5 years ago
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nanderson500 says

2 years ago
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thom lang says

3 years ago
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MindMatters2 says

24 months ago
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Daniel Abram (MrDanielAbram) says

24 months ago
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platinumOwl4 says

5 years ago
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knowledgeispowerr says

5 years ago
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Stephen Donovan (DonSteve) says

6 months ago
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someonewhoknows says

5 years ago
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nikashi_designs says

5 years ago
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  • Craigrendel 2 years ago

    Thank you. I'm glad somebody finally answered the car battery question correctly. Some people have no clue about their car battery. Engineers only make car batteries 12V or less. This keeps misinformed mechanics from dying from electric shock. LOL

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Rosemary Banks says

5 years ago
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  • someonewhoknows profile image

    someonewhoknows 3 years ago

    If,your car has a small battery & maybe even a cheap battery and it's one of those economy cars that has little or no accessories that most other cars have then I could see a problem .Your smaller battery & or alternator would not be up to c


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kipronor profile image60

kipronor says

5 years ago
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Huntgoddess profile image83

Huntgoddess says

21 months ago
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  • Huntgoddess profile image

    Huntgoddess 7 months ago

    I've been taking the bus for several years now. So I don't anticipate having to think much about this in the near future. Possibly never again?

    I was never a real strong driver. I didn't learn to drive until I was 49. Not sure I even miss it?lol

wesley5159214 profile image60

wesley5159214 says

5 years ago
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  • Craigrendel 2 years ago

    You couldn't be more wrong. Too bad.

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Joshtheplumber says

21 months ago
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  • Doug Cutler profile image

    Doug Cutler 10 months ago

    I believe you got that backwards. The charging battery is the one that is putting out the hydrogen. I blew the top off one testing a starter on top of the battery while the engine was running. Also you will see the hydrogen bubbles while charging

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Andrew (thranax) says

2 years ago
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vperry says

5 years ago
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