Many batteries in series (dangerous?)

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Main Question or Discussion Point

Is it dangerous to put, say, 100 D-cell batteries in series (the type you find in a flashlight)?
 

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  • #2
chroot
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That depends on your definition of "danger," I guess. It's less dangerous than typical 120V household mains, but it could still kill you.

- Warren
 
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  • #3
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Is it dangerous to put, say, 100 D-cell batteries in series (the type you find in a flashlight)?
Their rating is about 2000 milliamp-hours, so you could light a 100-watt bulb for a few minutes. But it is dangerous to touch both ends at the same time.
 
  • #4
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What is a reasonable limit where you don't have to worry about dying?
 
  • #5
chroot
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40 volts is generally below the threshold of sensation, with dry skin. Below that, you're generally safe.

- Warren
 
  • #6
RonL
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Is it dangerous to put, say, 100 D-cell batteries in series (the type you find in a flashlight)?
If the cells are ni-cads and fully charged you would have 125 volts DC, and if they are alkaline, you would have 150 volts DC, I believe both would kill a person.:frown:
 
  • #7
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Thanks all, I will keep this in mind.

I was googling around to find the answer to this, and as a result have another interesting but less practical question. A website claimed that if you have huge bleeding cuts on your hands, then the liquid blood could complete a circuit with much less resistance, thereby electrocuting you with as low as a 6V battery. Is this true?
 
  • #8
chroot
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I don't know about electrocuting (killing) you, but it'd probably hurt like hell. Put a 9V battery on your tongue for a sample.

- Warren
 
  • #9
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Thats what I thought, but blood vessels travel through the heart on the way from one hand to another, so it seemed possible that it could disrupt the heartbeat rhythm.
 
  • #10
mgb_phys
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There is also a fire and explosion risk if you short circuit them, especially if they are enclosed and so can't cool easily
 
  • #11
Are you actually thinking about doing this for something or are you asking this hypothetically? If so may I ask why? There might be better solutions.
 
  • #12
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I don't know about electrocuting (killing) you, but it'd probably hurt like hell. Put a 9V battery on your tongue for a sample.

- Warren
Ah the tongue voltmeter.Not to be recommended.:bugeye:
 
  • #13
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Ah the tongue voltmeter.Not to be recommended.:bugeye:
Here people give advice on some deadly current machine and you are warning against 9V block licking? :uhh:
 
  • #14
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Here people give advice on some deadly current machine and you are warning against 9V block licking? :uhh:
Well,I like the taste of chlorine I get after eating a bag of salted peanuts and when I spark up I demonstrate the squeaky pop test for hydrogen.The biggest problem is that the tongue voltmeter is so difficult to calibrate.:wink:
 
  • #15
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I've seen something similar done with 9V cells which clip nicely together in an end-to-end series chain of any arbitrary length.

Seemed dangerous to me once you got above the safe ELV.
 

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