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    zach479's Avatar
    zach479 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 7, 2013, 06:36 AM
    Why does my battery spark
    I went to charge my lawn mower batter I took the battery out and went to charge it I connected the positive then when to connect negative and it sparked even though charger was not plugged in?
    cdad's Avatar
    cdad Posts: 12,700, Reputation: 1438
    Internet Research Expert
    		  
    #2

    Sep 7, 2013, 07:35 AM
    It is possible it was charging a capacitor that is inside the charging system. Unless there is high heat or melting then I wouldn't worry too much.

    You don't want sparks occurring after you have been charging the battery as that can cause an explosion. Be careful to use all precautions like gloves and safety glasses when working with batteries.
    crigby's Avatar
    crigby Posts: 4,343, Reputation: 107
    Outdoor Power Equipment Expert
    		  
    #3

    Sep 7, 2013, 10:27 AM
    Hi,
    You are connecting what is in effect two sides of the coil of a transformer. If is a more expensive solid state unit, it probably will not spark. If it is a cheaper model, you probably are connecting the two ends of the secondary coil of a transformer. If it has a ammeter, you will see the needle jump.
    Peace,
    Clarke
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