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12 Volts DC not dangerous think again

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Showkey

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^^^^^^^^^^^

Or if you do use one.........follow the freakin instructions. Do not leave it connected.

If that car was running that's a problem......micro start says disconnect the power after starting and do NOT power thing using the jumper cables.

BUT I also would not buy one of the ultra cheap clone packs that are now every where.
 
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A

AR15Texan

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A portable fire extinguisher's purpose is to get you through a fire in a building to an exit. It is not designed to fight the fire until it is out. It should be located further inside the building not at the corner next to the door.
 
A

A**holes Garage

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:scared:

Don't think your supposed to leave it hooked up like a trickle charger.

Connect, start, disconnect.

I just used my Whistler Jump N Go yesterday on a Hummer. Worked great and then had to use it on my ATV.
 
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jimindm

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AR15Texan said:
A portable fire extinguisher's purpose is to get you through a fire in a building to an exit. It is not designed to fight the fire until it is out. It should be located further inside the building not at the corner next to the door.
Click to expand...

It also appears he picked it up off the floor by the door. It sure did not look like it was hanging.

I suppose leaving one sit on the floor is not a bad thing, if it sits there all of the time. I think hanging them is better. At least I know that is where they are supposed to be, when needed.
 
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jgorm

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12V DC will shock the hell out of you when you are covered in salt water. My "switch" consisted of twisting together 2 wires to start the pump to pump up the ballast tank. It was great until you are done wakeboarding and need to empty the ballast.
 
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Kracin

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i think the thing to take away from this is... is why the hell did he leave the damn thing hooked up?

i have a good theory on this. he thought it was like your standard plug in jump pack where you have a setting for a slow charge (2a) and fast charge (12a) and jump mode..... he either left the pack on there for an extended period of time thinking it was going to juice up the battery enough to start it, or he left it on there while it was running because he forgot to unhook it. either way, it should have been left hooked up for longer than it takes to get in, try to start it a couple of time, and get out to disconnect.
 
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404

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All this fuss for that little **** of flame? I could pee on that and put it out.

:confused:
 
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yeldogt

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I have a couple of those portable jumpers -- they don't use Lithium batteries. They use a modified sealed lead acid .. they use the same kind of battery as the computer back-ups ...... just ordered a couple replacements.

Think this is what happened to my tractor when I tried to jump it -- it happens quick.
 
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Dmaxman

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yeldogt said:
I have a couple of those portable jumpers -- they don't use Lithium batteries. They use a modified sealed lead acid .. they use the same kind of battery as the computer back-ups ...... just ordered a couple replacements.

Think this is what happened to my tractor when I tried to jump it -- it happens quick.
Click to expand...

This was one of the new style jump starter packs. They use a high capacity Lithium Ion battery pack.
 
K

Kracin

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yeldogt said:
I have a couple of those portable jumpers -- they don't use Lithium batteries. They use a modified sealed lead acid .. they use the same kind of battery as the computer back-ups ...... just ordered a couple replacements.

Think this is what happened to my tractor when I tried to jump it -- it happens quick.
Click to expand...

the new jump packs available are li-ion batteries, the same as laptop batteries (not the oldschool backup type that you plug all your stuff into).

they can definitely explode if you screw them up with excessive charging like that guy who probably left the car running with it hooked up. it's meant to charge at 2a, and he had a car running with it connected, so 14a about charging it, they aren't supposed to stay connected that long to a power supply like that.



also that is a cheapo battery, it's listed at 33,000 mWh, so they use the highest rated amount... instead of showing mAh or Ah or Wh.. someone who had one of those units posted the calculation and its like 2.7Ah at 12v batt. so not much capacity compared to the quality ones. and not much cheaper.
 
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wrench409

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404 said:
All this fuss for that little **** of flame? I could pee on that and put it out.

:confused:
Click to expand...

I could too but I'd have to stand REAL close.

:shocking:


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jkwilson

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Kracin said:
the new jump packs available are li-ion batteries, the same as laptop batteries (not the oldschool backup type that you plug all your stuff into).

they can definitely explode if you screw them up with excessive charging like that guy who probably left the car running with it hooked up. it's meant to charge at 2a, and he had a car running with it connected, so 14a about charging it, they aren't supposed to stay connected that long to a power supply like that.



also that is a cheapo battery, it's listed at 33,000 mWh, so they use the highest rated amount... instead of showing mAh or Ah or Wh.. someone who had one of those units posted the calculation and its like 2.7Ah at 12v batt. so not much capacity compared to the quality ones. and not much cheaper.
Click to expand...

Vehicle alternators are in the 100A range.
 
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UpstateNY

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nehog said:
Let's not get into that fallacy. AC is more dangerous, there is no debate to that. Tesla and Westinghouse fought that battle, it's over.
Click to expand...

Tesla won, AC won, (in part) because DC is more dangerous.
 
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Fireball027

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I had a similar thing happen to me in my Pontiac Montana.
Tried to start the van, had lights then everything went off.
Turn the key forward again, no power at all.
10 seconds later all the lights came on (interior).
Checked the connections, everything was good, but i thought I smelled a little sulfur.
Tried to crank it again, and the side of the battery blew out.
 
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srmofo

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UpstateNY said:
Tesla won, AC won, (in part) because DC is more dangerous.
Click to expand...

No, it was because DC doesn't carry long distances. Electric DC stations had to be positioned close to each other

As far as which is more dangerous, isn't that sort of like asking which is more lethal, a .380 to the head or a 9mm?

Point being both need to be respected.

Forgot to mention that AC also produced a much brighter whiter light than DC could at the time making it more desirable
 
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Kracin

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jkwilson said:
Vehicle alternators are in the 100A range.
Click to expand...

sorry i was thinking about the charging voltage after it makes its way through the system, but yeah you are right they can produce anywhere from 80 to 200 amp depending on the alternator and engine rpm.
 
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jgorm

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srmofo said:
As far as which is more dangerous, isn't that sort of like asking which is more lethal, a .380 to the head or a 9mm?
Click to expand...

I've been shocked by 120V DC when I touched a plug charging an electric car at 30A. It made my arm feel weird for a month. It was 100x worse than 120V AC and felt like I got punched.
 
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jkwilson

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The biggest advantage AC power has for power transmission is that the system can operate at high voltage for transmission efficiency and the down conversion at the customer facility can be accomplished by relatively cheap and reliable transformers. DC voltage changing requires a conversion from DC to AC and then back to DC.
 
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callcoy

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I want to thank the original poster, I think this is a real wakeup call for many people or a reminder for a few.
 
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tdkkart

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A friend got his class ring caught between the battery cable and the fender of his car. The ring got welded in place, and damn near burnt his finger off before he got out of there.
 
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