A Reverse Polarity Situation?

Did you know Deans Connectors are actually marked?

http://i160.photobucket.com/albums/t...m/DSC06809.jpg

I highlighted the markings with a sharpy for this picture.

I bought a RC Boat from Ebay one time. It has a pair of Titans in it and the EVX ESC. Just to try it out, I got a pair of my 5000mah Lipos that I had been using with Monster Trucks.

I'm not sure if the ESC was turned on or not, but there was a HUGE spark when I plugged it up.:oh::surprised:

The Wires got VERY hot and one of my Lipos let go. All of this happened in a few milliseconds. I didn't have time to unplug it before this happened even though my hands were still on the plugs.

This took out the ESC and one of my Lipos.

After some checking, I figured out the guy I got it from had "upgraded" to Deans. :oops: He installed them reverse polarity on the ESC, AND on his batteries. So it worked for him.

He would not make good on it. I filed a dispute with paypal about it, thinking I would show them my "proof".

The guy left me negative feedback accusing me of lieing about the entire thing. Then Paypal ruled in his favor and closed the dispute without even contacting me for more information.

If you get something used, it pays to double check everything.

this is kinda like me pulling a dumbass move when i first got started i was building my LS10 and i bought a 9L off of linc, first run its get so hot you could cook off of it and finally we figured out i put long motor screws in it all the way to the winding and was shorting it out, i was lucky to not puff my crapamps 3s and fry my mm, everyone learns SOMETHING the hardway i think it wasnt anything you did. atleast they were just cheap protek packs for his sake.

I do admire shaun's take on it and i would stand buy that whenever nessicary but i dont think this is one of those incidents, say if one of my quads i sold frame cracked in a typical area first time the person rides it im gonna go outta my way to get that fixed and make sure there is anything else wrong. In that kind of situation id definetly feel responsible (mostly because i give my bike HELL)

Scary stuff there Shaun! :gasp: :lol:

Wow Jerry, you are really having fun with this! Do you want me to ride him around like a pony and take some pics for you? Bad mental image there....

Do you think i would not slap Shaun around if he was dressed like a lady? Apparantly you have no idea what i am really like...

You have no idea.........:whistle:

This needs to go in the "tips" thread!

I have seen all kinds of horrible wiring and other abortions of nature. I buy alot of stuff used (I am cheap) and always give everything a thorough once over before I use it. I do buy alot of used lipos off RcGroups (plane guys take good care of their stuff) and never buy without pics.

Hmmm, a brown belt with black shoes, what were you thinking! I can see you!

I had that exact same thing happen to me. Fried a good lipo and ESC because the previous owner installed his Deans backwards and I didn't double check it first. Shame on both of us!

I'm wondering (and asked him) if he didn't change connectors. I'm almost certain it was reversed. I sent them with Deans on them that were correct. The first pack was run without issues, then boom the second one causes all the trouble.

Is he willing to send you pictures of the lipos and his set-up so we can inspect it for any obvious mis-wiring?

I never accuse anyone without proof. Sounds to me like the guy screwed up and won't admit it. One charge without balancing should not be an issue anyway. I think you have done what you can and should now be free to cut all contact, wash your hands of this deal, and move forward.

You could email him a picture of Shaun and James in drag together to ease his pain though!!!!

It does put on quite a show doesn't it?

The absolute Maximum Burst Capacity of Lipos must be way up there when you dead short them. LOL

What type of ESC fried on you?

It was quite a show, but not quite as impressive as when I accidentally dead-shorted a 10s a123 pack!

I can't remember the name of the ESC. It's been a while. It was a brushed ESC, so I guess I really wasn't out much. I was much more annoyed by the lipo loss.

Kid???
 

If this is a young kid that you are talking about this could do irreperable damage to his mental state of mind. Just the thought of it gives me shivvers. Although you could probably go to the local bar and catch them there dressed just as you described.

Thats cool.
 

That is too bad, but it is very cool that you can come here to share the experience with everyone here. It may give just one person a good enough reason to be careful and double check their own stuff in order to avoid this type of catastrophy. We all learn from mistakes, so why not someone elses mistake???:lol:

Since we're talking about "Dead short" shows, this reminds me of an incident at work.

I was changing out an SB350 Connector on one of the forklift batteries.

They are 1000ah 36 volt, Lead Acid type, and weigh about 2850lbs each.

To get the lugs out of this type of connector, there are springs that you have to press down with a flat screw driver, then the lugs will slide out the rear.

Well, while I was pressing, something slipped, the connector turned and that screw driver was suddenly jammed in there shorting the terminals.

It snapped that screw driver in a spray of pretty sparkly thingies.

I think the correct word is "abated". LOL

Stories.
 

Back when I was in the Navy stationed in Hawaii I had a co-worker do something similar with an 18" screw driver. All I saw was a bright flash of light, and the only thing left of the screwdriver was a piece of the handle about the size of a common egg. The rest of it had desintigrated/vaporized. he was checking for voltage and did not feel like climbing down from the ladder in order to get his muiltimeter. What an ass. Scared the bejesus out of everyone around, and he fell off of the 20' ladder that he was standing on. Some people actually have accidents, and some are just stupid.

When I used to build steam cleaners, we had a metal cutting saw for cutting pipes, ran on 3 phase but didnt have a good switch. My buddy went to turn it on, not making sure not to hit the exposed wires, and I though him laying on the ground asleep was a joke till I saw urine all rinning down his leg. Dont mess with the big volts lol

My brother was driving down the freeway when he noticed smoke coming out from the engine bay. The metal battery hold down had worked itself loose and dead-shorted the car battery. Oops.

Anybody know much about Protek Lipos? I see why he was talking about me switching the label now. It certainly wasn't me, and looks to be their method of labeling, but I'd be suspicious if I were him. If anybody has any info to that effect, I'd love it. Here are the pics I took followed by the one he just sent me:
http://i293.photobucket.com/albums/m...s/DSC_0175.jpg
http://i293.photobucket.com/albums/m...8/P1080208.jpg

they look like cubes of turd why would you buy them in the 1st place and feel confident selling them to another LOL, did you buy them from amain? if not I dunno

????? They look like any other lipo I've owned.:neutral:

http://i293.photobucket.com/albums/m...8/P1080208.jpg

Well, the one that puffed appears to be a 3c discharge rated rx pack... Might explain why it puffed.

Cubes of turd... Gotta love that JJ!

No, to clarify...
They are labeled 20c packs. The label that you see peeled up is the factory label that was pictured in the first pic. That's what I'm wondering, whether it's normal or not for manufacturers to label over a standard label like that. Besides, even a 3c pack wouldn't puff like that and blow a speed controller just by turning on the switch.

Did he send you a pic of the plug... Wonder if he changed it out before use?

Suspicious
 

That does look suspicious to me. Why would any manufacturer tape one label over another? It lookslike someone tried to hide the fact that those batteries were only 3C. Not that you tried to fool anyone, but that is pretty shady by any sense of integrity. I would be pretty pissed off if you sold those to me as well. Honestly Iwould never buy any LIpos that looked like that anyway. TURDS??? You kill me with your analogies JayJay. You seem to be a pretty smart guy JayJay, but you have a real Geto way of expressing yourself sometimes. Keep it up though, because you put me in stiches on a daily basis in here, and I am sure that is true for most of the guys on RCM.:lol:

Ya, plugs look fine. I'm still anxious to see what Novak says, but with this new development I'll probably just buy them back from him and have Amain take care of it for me.

That's what I thought. These are packs a national caliber crawler guy I know uses or at least he used to. I used them in my B44, and judging by the punch and lack of puffing, I have no doubts they are really 20c. The pack label said 20c 2000 mAh also. The label on the puffed one says it's only 1000 mAh. They charged just fine at 2 amps and took around 1800 mAh each time. If you look at the non-puffed one, you can see the same label cover-up. Why the hell couldn't they print unique labels for each?

What is everyone's problems with the way they look? Normal shrink wrapped saddle packs:neutral: