Cross polarization of battery:

[Nostril Cheese]

It really depends on the car being charged and how long the cables were attached.

There's usually a big fusible link somewhere in the system for this very reason.

On older cars, it would usually fry the diodes in the alternator. On newer cars, you could fry control modules but they also have more safeguards built in. If it's an VW/Audi, all bets are off.

[flatbutt]

Originally Posted by sc_rufctr

I bought one of these about 12 months ago and I've used it three times. It lives in the "boot" (trunk) of my daily.

- Honestly it's one of the best things I've ever spent money on. Highly recommended.

So hard to pick one w/out recos

https://www.bestreviews.guide/Jump-Starters?origin=google&google_params[matchtype]=e&google_params[network]=g&google_params[device]=c&google_params[creative]=484594764685&google_params[keyword]=car%20jump%20starter%20portable&google_params[adposition]=&google_params[adgroupid]=114834198451&google_params[campaignid]=11125964291&bs=&google_params[feeditemid]=&google_params[targetid]=kwd-307720059817&google_params[loc_interest_ms]=&google_params[loc_physical_ms]=9003587&google_params[devicemodel]=&google_params[target]=&dest=0&sys_id=0|903&gclid=Cj0KCQiAieWOBhCYARIsANcOw0xMmVK1JQ3Q_7-8nXC5Z_LUVoNIaBrNGC_SJbc-nJOLhvnJV8znk14aAjDrEALw_wcB

[Rodsrsr]

[flatbutt]

Originally Posted by Rodsrsr

wow, but toxic man 'splaining. "we don't need your guys's help"

[sc_rufctr]

Originally Posted by flatbutt

So hard to pick one w/out recos

...

I can't really recommend a brand available in the US. I bought mine from Jaycar electronics. It's like your Radio Shack. I asked for the best one they had... They're all made in China but you don't want to buy the cheapest one. Mine was about $300 and it's rated for SUV's. It has a built in torch and you can also use it as a charger for a phone.

It's so handy. About 2 months ago my sister in law's battery went flat and she was parked on a city street. There were cars parked front and back of her car so there was no way I could use jump leads. I just walked up, popped the bonnet, connected it up and started the car. She'd had been stuck there for about 2 hours. You should have seen the look on her face! lol

[sc_rufctr]

Rodsrsr...

"We're not hitting on you" - Good lordy... That reminds me of something that I saw happen at a gas station. There were some kids adding oil to a car. And they didn't know what a dip stick was. They just kept adding oil until they could see it in the filler.

[Bill Douglas]

Originally Posted by sc_rufctr

It's so handy. About 2 months ago my sister in law's battery went flat and she was parked on a city street. There were cars parked front and back of her car so there was no way I could use jump leads. I just walked up, popped the bonnet, connected it up and started the car. She'd had been stuck there for about 2 hours. You should have seen the look on her face! lol

That alone paid for it.

I should get one.

[Nostril Cheese]

Originally Posted by Rodsrsr

I've actually seen entitled women do FAR worse. And I have used the "Im not hitting on you, Im trying to prevent you from going up in flames" line.

[drew1]

Originally Posted by gregpark

I remember hearing of a couple guys jumping a car backasswards like that and a battery blew up. Both guys were drunk and one was injured pretty bad.

I remember a neighbor doing this. My wife gave him some silverdene cream that I had left over from catching oily pants on fire with sparks from a cutting torch.

[T77911S]

Originally Posted by Rodsrsr

that's hilarious

after the offer and being accused of hitting on them I would have just shut up and kept filming.

I thought "maybe" one car has a bad alt and just wont keep running but she said they "know what they are doing and trying to get the AC to work."

priceless.

there comes a time when B***** exceeds looks and that is it.

[aschen]

Originally Posted by flatbutt

wow, but toxic man 'splaining. "we don't need your guys's help"

Project farm on youtubes did a few comprehensive tests of the various units. Worth checking out before purchase.

I ended up with this one based on this

https://www.amazon.com/gp/product/B07T49JQBR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I have very bad luck with a NOCO one I had purchased prior, would avoid.

[vash]

Originally Posted by flatbutt

wow, but toxic man 'splaining. "we don't need your guys's help"

that guy is annoying as hell. i would have driven off a long time earlier in the process. who even cares?

[dad911]

Originally Posted by Rodsrsr

I drove about 5 miles home once with a jump-pack. Bad alternator, truck would jump but not stay running, so I left it on with the hood popped and nursed it home.

[Rodsrsr]

I don't help young girls anymore, and this is why. Old lady's and Men YES, but young cute girls, I just drive on by. They have a phone, they'll figure it out.

[widebody911]

I bought one of those 2 years ago, on the 'buy a plunger before you need a plunger" theory. A couple weeks ago, the battery in my M3 died and lo-and-behold, that little gizmo got it working. However, it's really only good for a battery that's just on the cusp of no working; once the battery really dies (as mine did a few days later) this device won't be of any help.

https://smile.amazon.com/gp/product/B07DWSYYZR/

Originally Posted by sc_rufctr

I bought one of these about 12 months ago and I've used it three times. It lives in the "boot" (trunk) of my daily.

- Honestly it's one of the best things I've ever spent money on. Highly recommended.

[flatbutt]

Originally Posted by widebody911

I bought one of those 2 years ago, on the 'buy a plunger before you need a plunger" theory. A couple weeks ago, the battery in my M3 died and lo-and-behold, that little gizmo got it working. However, it's really only good for a battery that's just on the cusp of no working; once the battery really dies (as mine did a few days later) this device won't be of any help.

https://smile.amazon.com/gp/product/B07DWSYYZR/

On backorder until March.