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i was working on a pancake horn off the bike and i had a 6 volt battery for testing, after a while of horn testing the charged battery just died???
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Yes. Other than an electric starter (which only applies to most 12V bikes), the horn takes to most current to operate on a motorcycle. It's basically a solid coil of wire from positive to negative volts to form an electromagnet. Once it pulls in one direction a set of points releases the hold of the electro magnet and it returns (under spring pressure) to it's normal position. At that point it re-energizes and this opening and closing of the circuit very quickly causes a high frequency sound that can be heard as a horn blaring.
Long story - short, yes, it will drain your battery rather quickly. Just re-charge it after your testing.
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