Hover boards....

[medhead]

That would be worse than using water as an extinguishing agent for battery fires. Other than Halons, which are no longer freely available to the public, water is the most effective extinguishing agent in this situation.

I wrote dry powder, not dry chemical. It has the widest range of applicability including powders that are suitable for metal fires.

https://www.wormald.com.au/fire-pro...xtinguisher-selection-and-fire-classification

Not to mention that we don't know if the item was still electrically energised in the case linked. My warning was entirely about electricity and water not mixing, I don't think the effectiveness of water is going to be a consolation if you electrocute yourself.

This morning's ABC TV news carries a story of a sparking charging hoverboard that was unable to be extinguished by buckets of water and went on burning to cause a fire that destroyed the whole house in Strathmore, a suburb of Melbourne.

 

[jb747]

Well yes, I would first try to get it outside. But that would be highly dependent on the situation. I can only assume that the people in the linked story didn't feel capable of moving the thing outside the house.

Throw a blanket or towel over it, and you'd have a pretty good chance of getting it outside. Of course, if the kids watched it burn for a while before calling for help, it might be more of an issue....

But, I only made the comment because I had a WWII type of image of you riding it outside, followed by a trail of flame and smoke.

 

[ethernet]

Oh, they corrected the problems, but only after the product had marched out the door.
To the hover boards - multiple charges are weakly described as non-compliant - disgraceful.
The voltage out -30-48 volts indicates about 8 cells are probably in the battery pack,
Now how many thermal fuses?

Many of these non-compliant chargers are extremely vulnerable when loaded with 240V - maybe not so much with 110V in many parts of the world but 240V as we have in Australia is a different matter. Many of these cheap non-compliant chargers will ignite / combust way before the battery - no matter which it is there will be a never ending stream of these occurrences until their importation / sale ceases - policing is going to be very very difficult.

Agreed. Lets have someone listed in a 'Silicon Chip' magazine take one of these puppies to bits and list the deficiencies. Include peak to peak AC charger capacitor rating, UL status, and if more than one thermal fuse for the 8-10 cells in the battery pack are actually connected to anything. Becaus ethe recalled chargers are only half the problem.

 

[medhead]

Throw a blanket or towel over it, and you'd have a pretty good chance of getting it outside. Of course, if the kids watched it burn for a while before calling for help, it might be more of an issue....

But, I only made the comment because I had a WWII type of image of you riding it outside, followed by a trail of flame and smoke.

lol. That'd be a cool thing to try.

 

[leadman]

There is a whole host of problems going on here; from the Li battery (poor, cheap manufacture, wrong materials etc,) electrical chargers (falsification of parts and equipment, ultrathin wiring etc) to the whole problem of overcharging these batteries that can take a fair charge. Li batteries just seem to keep getting away with being the problem and don't get the scrutiny of other systems, simply because they are powering so many luxury devices we all use today. And there is more problems to come as systems get bigger; just think of having a Chinese copy "Tesla wall" sitting on your wall!!! I work in the battery industry (Pb-acid) and it scares me to see what is coming through. The photo is a Li battery designed like a car battery and hard to tell except by weight. They cannot be recycled but are mixed with Pb acid and either explode or cause fires.

 

[marki]

https://www.facebook.com/jacksonodohertyvideos/videos/815654458579728/

Tradesmen on Hover board

 

[opusman]

Interesting article on the original inventor of the "hoverboard" and how he is being ripped off by all the cheap Chinese copies.

The inventor of the hoverboard says he's made no money from it | Technology | The Guardian