Jumped my suburban with a gens 4s 5300

[TheShaughnessy]

Do they only generate the gas when being charged? Seems like conditions would have to be just right. A breeze should keep hydrogen density down?

[Doug Smock]

http://www.sightandhearing.org/sightcenter/battery.asp

Be careful guys, or be one of the 6000.

[keithbradley]

http://www.sightandhearing.org/sightcenter/battery.asp

Be careful guys, or be one of the 6000.

...or one of the 240,000 each year: http://en.wikipedia.org/wiki/Lightning_strike
Just putting things into perspective.

[Doug Smock]

...or one of the 240,000 each year: http://en.wikipedia.org/wiki/Lightning_strike
Just putting things into perspective.

Right Keith.
The difference is lightning is out of your control.

I thought this topic deserved a word of caution. It's out there, some people got the point.

Later

[keithbradley]

Right Keith.
The difference is lightning is out of your control.

I thought this topic deserved a word of caution. It's out there, some people got the point.

Later

No worries. I understand what you're doing. Just giving you a hard time.

[capnswanny]

Am I missing something here....are we saying "don't jump start a car" or "don't use a 4s lipo to jump start a car"?
Seemed like a pretty good idea (in a pinch) until I saw the warning posts.
"Could have been a trip to the emergency room or worse." "Yes sir, scary stuff." "Something I have not seen done or for that matter really don't want to see."

I followed the referenced article but can't find a reference for the stated 6,000 injuries annually as a result of jump-starting? (out of 1,000,000,000 plus cars on the road BTW)

Not trying to be argumentative here, but am I missing something beyond the obvious or am I just missing the punch-line?

Ignite the hydrogen gas associated with lead acid batteries and you may not see a problem with anything.

Like I said, just throwing a bit of caution in the thread. Do what you like.

[Doug Smock]

Am I missing something here....are we saying "don't jump start a car" or "don't use a 4s lipo to jump start a car"?
Seemed like a pretty good idea (in a pinch) until I saw the warning posts.

Not trying to be argumentative here, but am I missing something beyond the obvious or am I just missing the punch-line?

Oh no sir. You haven't missed a thing!!

Very sorry for wasting your time guys. I'm an idiot, and an alarmist.
What could possibly go wrong jump starting a vehicle as described in the first post?

You guys continue to beat this to death with your superior intellect and common sense.

I'm going to go finish a gas cat build for a fellow club member and load the trailer for a fun run tomorrow.

Looking for clear skies and 71 degrees.

Have a great weekend!

[Doby]

Oh no sir. You haven't missed a thing!!


Looking for clear skies and 71 degrees.

Have a great weekend!

Bastard.....

I'd flush the toilets for you but all you would get is ice cubes.

[stadiumyamaha]

I wouldn't mess with that gas stuff, its flammable.

[egneg]

I have had a car battery explode ... not a pretty sight. The difference is your proximity to the battery when this happens.

[larryrose11]

Not sure what the amp draw on the truck is at startup so I can't say what the safety issues are. .

I can tell ya from professional expirence that for starting an I4 engine, about 10:1 compression, traditional brushed DC starter:
- the first 0.200 second of inrush current is about 400A.
- by 1 sec it has decayed to about 75 A.
For an V8 engine, about 10:1 compression:
- the first 0.200 second of inrush current is about 800A.
- by 1 sec it has decayed to about 120 A.

[egneg]

I can tell ya from professional expirence that for starting an I4 engine, about 10:1 compression, traditional brushed DC starter:
- the first 0.200 second of inrush current is about 400A.
- by 1 sec it has decayed to about 75 A.
For an V8 engine, about 10:1 compression:
- the first 0.200 second of inrush current is about 800A.
- by 1 sec it has decayed to about 120 A.

Agree ... that is why batteries are measured by CCA.

[sailr]

I have jumped my car with 4S lipo on more than one occassion. No problem! I keep a wiring harness in my car with batt clips on one end and 5.5mm bullets on the other. Makes it simple! As with anything, use caution. If the battery is outgassing, any spark can be dangerous but so can just hooking up a standard car battery charger. If you have a very old or weak car battery, I'd not suggest using the lipo to start it. But if you just ran your battery down by leaving the dome light on or something simple, the lipo will crank you up very quickly.

IF you have to grind the starter for any length of time, I wouldn't use the Lipo either as the amp load will get pretty high.