Can somone explain WHY positive first when jumping a car battery?

[Rod Speed]

Less corrosion due to galvanic effects.

[Rod Speed]

That makes no sense because it would happen with any very poor battery which does eventually manage to start the engine.

Nope.

The best way to change batterys is to keep supplying 12V with the original battery removed until the new battery has been connected. Thats what the pros do to avoid the antitheft system kicking in.

[Rod Speed]

But don't understand the basics.

The reality is that there arent any significant amounts of lower boiling point liquids in normal tap water and certainly none that are a problem in a vehicle battery.

Ditto with those.

But don't understand the basics.

<reams of stuff irrelevant to water for vehicle batterys flushed>

[Frank]

It appears wrong to me too. Do not know where these claims came from except maybe somebody trying to tout their own system.

[Frank]

I am a retired chemist and we are in agreement.

[Rod Speed]

You are wrong with the question of accidentally touching the body etc with the positive lead when the negatives have already been connected. Much safer to connect the positive terminals first.

Sparks aren't the problem. they happen regardless of which of positive and negative you connect first.

The reality is that with the battery in the engine compartment with the hood up, there will be on concentration of flammable hydrogen gas.

Even with the few cars that have the battery in the passenger compartment or the trunk, thats still very unlikely because the battery only produces hydrogen gas when it continues to be charged after it is fully charged.

But which won't be being charged unless the engine is still running.

Only AFTER the connection has been made which allows that.

The reality is that it isnt about hydrogen gas, its about accidentally touching the body of the recipient car with the positive jumper lead before it is connected to the positive post of the flat battery.

[Rod Speed]

No its not, because its impossible to collect rain water that has come off the roof without some dirt and stuff like bird shit and leaves from the roof, quite apart from what happens to it sitting in your tank between when it came off the roof and you get some to add to your battery.

The problem is the lead carbonate. Not enough to matter tho.

Nope, because of whats on the roof and in the gutters dirt and bird shit wise.

The difference is that the distilled water hasnt fallen thru thousands of feet of air in small droplets.

Doesnt help with the solubles.

You can't see solubles.

That's obvious.

Wouldn't dream of doing that. You might burst into tears and that would be rather embarrasijng and someone might claim I have breached community standards.

[Rod Speed]

Trouble with that approach is that you can't usually connect the thick battery leads to the new battery until the new batter is where the old battery still is.

[Rod Speed]

Fraid not.

That's obvious.

Some tap water is quite hard and produces lots of scales in an electric jug over time.

That doesn't.

Fluoride, not flourine.

Yes, with hard water.

Not normally enough to matter.

But some still have water from wells for their tap water.

Particularly as most don't add water to their car battery anymore with sealed batterys.

And how much limestone there is. Lots in some places.

Or distilled water given that its cheap and you dont use much.

The battery manufacturers do.

[Rod Speed]

Peter [e-mail]> wrote

It doesn't leach out of the plates, its boiled off when the battery is still charged when it has been fully charged already.

That's wrong too.

There is no equilibrium involved. You presumably mean that the dissolved stuff spread thruout the pool.

Utterly mangled all over again. Lead doesnt dissolve in water enough to matter.

Corse the designers of car batterys have.

[Rod Speed]

Trivial to test that by weighing the battery before and after.

The reality is that modern cars use sealed batterys and no one adds any water to them anymore.

[Rod Speed]

That's wrong. You don't get hydrogen when attempting to start the car with a battery that is flat or can't deliver the current the starter motor requires to turn the engine over fast enough.

Yes, but thats not because of the hydrogen.

More chance of accidentally touching part of the body of the donor car with the positive lead clamp.

& the donor has less outgassing

A, but for a different reason.

[Rod Speed]

Nope.

We aren't discussing JUST drinking distilled water, we are discussing whether it is dangerous to drink it.

Bullshit. At most it might mean you don't get enough salt if you drink lots of it and dont eat anything.

That's the opposite of what you just claimed.

Doesn't need to if you get the salt from fool or salt tablets.

Just because some fool claims something...

The reality is that there are no contaminants like that in the water used to make distilled water for car batterys.

So do deionizers.

Or contaminants that have the same boiling point as water.

[Rod Speed]

It doesn't but when some fools started buying it up so they wouldn't be without it, other fools followed suit.

[Rod Speed]

Only if you are in a hard water area or use your own well water.

[Rod Speed]

No, because the battery doesn't gas unless it is being charged when fully charged already and that won't be happening with either battery.

[Rod Speed]

Its more complicated than that in reality because you wouldnt leave the top off after you have used some to top up the battery.

But isn't impure enough to matter in reality.

[micky]

I was probably iln my 50's then, but no. She was in her 20's or 30's, nicely dressed, and black. Most of the time girls don't offer to help. I think especially pretty girls are reluctant because guys take it as encouragement, so I had to be especially polite to her. I couldn't come on to her even though I wanted to. But my car started.

[invalid unparseable]

Rod Speed wrote on 1/18/2023 7:52 PM:

For them, it is a logical consequence of hoarding food in a survival mode. What goes in, must come out.

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Peter wrote on 1/18/2023 5:39 PM:

Medical research says that enlarged prostate is a direct consequence of male hormone, much like male pattern baldness.

I haven't reached a state that I have problem passing urine but I can sense that the passage is narrowing because it takes longer to empty the bladder.

I have been experimenting with all sorts of herbal hair tonics for more than ten years now. I am not bald yet, but like every man I am thinning at the crown.

Finally I come back to think about dealing with the male hormone, the alleged culprit of male pattern baldness and enlarged prostate. I found out on the internet that soybean and the artificial sweetener "Stevia" have female hormone effect. So I started using Stevia instead of Sucralose, and eating a lot of tofu.

I also make 1% Stevia water mixture as hair tonic to apply in my crown area. I add 10% in volume isopropyl alcohol mainly as preservative. I don't know if Stevia can rot in water but I imagine no bacteria can grow in 10% IPA solution.

For tofu, I buy from Chinese supermarkets soft tofu in plastic buckets that look like this photo:

I empty all the water and refill with cold tap water everyday and keep in the refrigerator.

You might be able to find soft tofu in small plastic flats of 4, or 6 cubes in normal supermarket but Chinese supermarkets also sell tofu in bucket size plastic containers as shown in the above photo.

My way of eating this tofu is:

Put one cube in a 2 qt batter bowl like this

Cut the tofu in the batter bowl with scissors vertically many times without holding the tofu by hand. Then add some cooking oil and close the lid. Put into microwave and nuke it.

The steam can escape from the lid so there is no danger of the steam and pressure blowing the lid off in the microwave.

Season with anything you like, but I usually eat it with other food in my meal.

It will take a long time to see results in countering the deleterious effect of male hormone in man's hair and prostate, but I can tell than I have less sex drive after two months of using Stevia as sweetener and adding tofu to my diet. Maybe it is working.