This -^ is one reason. A very flat battery can discharge hydrogen gas. By making the connection farther from the battery you minimize chances of a spark igniting the hydrogen. This is a pretty minimal risk in my book.AFAIK, it’s done to minimize the chances of a spark near the battery, where there’s the potential existence of explosive gasses.
You're right my bad. The thread title is about jumper cables. However, the initial posts describe connecting - a device - portable jump starters to a dead battery.I really don't understand your post.
Wrong thread for me or you ? This thread is about jump starts as I understand , that's what i referred to. It's not about just connecting batteries .
It's in the picture and in the YouTube video.
Again my bad: I misread the first diagram. Yes, they are the same.Both the picture and the video states the same , start with the positive cable first (battery to battery) then go with the negative but the negative goes to the depleted car's engine block or predefined negative jump start point.
So you are saying one should not do what the GTK manual says to do??? And also not do what people have done for years, run the donor car's engine at all??Last, from Gtk:
"Let the engine of the donor vehicle run at a higher engine speed."
This is a good way to risk damage the alternator on the donor car. Best to just use the donor's battery with the donor's engine switched off.
No problem , it got a bit confusing who is talking about what 😇You're right my bad. The thread title is about jumper cables. However, the initial posts describe connecting - a device - portable jump starters to a dead battery.
Again my bad: I misread the first diagram. Yes, they are the same.
I learned to do it the wrong way as a kid. Only since I've owned and worked on Porsches have I learned that it's not the best way.This is also how I learned and did in the previous decades. Make sense not to run, not to put additional stress to the generator. Luckily never had any issue with it.
Yup.So you are saying one should not do what the GTK manual says to do??? And also not do what people have done for years, run the donor car's engine at all??
This is my understanding of the issue (which is subject to debate and/or correction...)The way people have done it for years is to set up the jump with the donor car running, start the receiving car, disconnect the cables and let the receiving car then re-charge its own battery. The donor car never "donates" for more than a few minutes.
I think that - just like connecting the ground cable to the negative battery terminal might cause an explosion - the risk of alternator (or eletronic module) damage is probably small. The risk of alternator damage, from what I understand, is proportional to the age of the alternator (wear and tear.)I had one occasion long long ago where the tiny battery and alternator in my Datsun 510 could not provide enough juice to turn over a much larger engine with a very dead battery. A much larger vehicle had no trouble with it though. But I've never had that process damage the donor alternator. I doubt the GTK manual would say to do it if it was so risky.
Spin against each other 🤣