Regarding ECF Safety Specification For Metal Tube Mods

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rolygate

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As I've already said, if there were a way to prevent dud batteries being inserted into mods, we would try to promote that, as it is the core of the issue.

However, this is impossible. It is simply not possible to prevent dud batteries being inserted into gastight mods. The solution is to do something about the gastight mods, as that is simple, achievable, and the basic duty of the manufacturer.

It's a bit like car manufacturing: if you build a car these days it has to be able to survive normal misuse and collisions without severely injuring or killing the occupants. There are regulations for this now, since otherwise dangerous cars would get onto the road. Civil liability is a factor in preventing manufacturers selling faulty cars but it doesn't stop them getting onto the road in the first place.

So: a new car design needs to survive normal low-speed traffic collisions without killing the occupants, since low-speed collisions will always take place. Cars will get rear-ended at 20 mph and you cannot stop that, whatever you do. You can try education, or making rules about having a 50-yard gap in traffic, or whatever else you like - but rearend crashes are always going to happen. Trying to stop rearenders is a useless waste of time when the fix is easy: build the car correctly.

All modern cars will survive a 20 mph rear end collision without the fuel tank rupturing because that is what the regulations call for, plus anyone selling a car that kills its occupants in the event of an expected and survivable collision of this type will be liable in law. As a result, when a few years back some vehicles were found to burn up or kill the occupants after a low-speed rearend such as is normal in traffic, because the fuel tank ruptured far too easily due to faulty vehicle design, the manufacturers had to pay millions in damages. A vehicle has to protect its occupants in case of a traffic event that is foreseeable and which any other vehicle will survive without injuring the passengers. The Pinto etc were just bad designs and may not have been tested properly.

The same is true for an ecig mod - insertion of faulty batteries is a normal event and to be expected, and in some cases will result in an explosive failure event. The mod, being a consumer device placed directly in front of the face, and partially inserted into the mouth, needs to survive a known risk that has numerous previous examples, without severely injuring the user. In view of the fact these incidents are known to occur, and that injury is easy to prevent by design improvements, the supplier of such a device will have the same defence in law as the manufacturer of the defective vehicles: none.

ECF has a duty to (a) protect its members, and (b) do what it can to advocate for the resolution of an issue that will affect the rights of millions of people.

'Dangerous exploding e-cigarettes' will be used as an excuse to ban or restrict ecigs. Here is a quote from a newspaper report on one of the recent blowups, where the victim's wife told them: "I heard a sound like a gunshot, then my husband screaming. I ran into the room and his mouth and face were on fire".

Of course, she could have made it all up and it's a conspiracy. Unfortunately the global media who reported it, the Fire Department, the local Police, and the hospital where the victim spent a week would need to be involved, which seems a bit far-fetched. Want a few more juicy quotes like the one above to help out our opponents? Good - just deny there's a problem and deny there's an easy fix.

Tick one of the following answers, whichever you like:

a. We can try to educate the entire world's ecig users, stop the million dollar counterfeit battery trade, ensure that only genuine batteries are sold, and absolutely stop a bad battery ever being put into a gastight mod anywhere. (This would require a staff of 500 people, a budget of $25m, and even a government wouldn't be able to stop the problem despite those resources.)

b. We can try to educate the very small number of people who supply obsolete equipment, and point out to them that the situation is entirely different from when they first brought out their designs, since now it is a simple fact that dangerous fake batteries will be used without the knowledge of the user, and as a result their designs need a simple upgrade in order to safeguard the users. (Easily achievable with few resources and no cost to anyone since the buyer pays.)

Another question you could answer, if you like. In the following situation, exactly whose fault is it and who will be liable in the civil suit resulting:-

An experienced vaper introduces a friend to vaping. He owns a particular make of mod that takes two batteries for 6 volt vaping and tells his friend that this is the way to go. He buys all the supplies himself for his friend, on his own credit card, and thus has all the receipts for the purchases and knows that this was the only equipment used and that no other materials were used subsequently by his friend. He buys the mod, the battery charger, and two sets of batteries, which are of the safer-chemistry type and what he himself uses - all from the vendor, who is also the manufacturer of the mod. His friend is very happy with the result. However a week later the mod explodes in his face, causing the most severe damages that we have full details of to date. Apparently the top end of the mod blew off into the mouth and face. (This is not the Niceville, Florida incident by the way.)

Initially the injuries and treatments include the following, but a series of operations will be required in the future (and omitting details such as a fire in the room):

Concussion.
Taken in ambulance to ER.
Sedated.
Minor procedure to remove several broken teeth and foreign materials from within the mouth.
Operation to remove metal and plastic shrapnel from the back of the throat.
Sedated and intubated (breathing tube inserted down throat).
Operation to remove shrapnel from the face.
Dental operation to stabilise damaged teeth.
Scheduling of operations on face by plastic surgeon.
Scheduling of operations by plastic surgeon to rebuild broken lower jaw.
Scheduling of operation by opthalmic surgeon to remove shrapnel from surface of eye (sight appears undamaged at this time, though vision is affected due to foreign matter embedded in the surface of the eye).

Whose fault? Who will pay? (Medical costs, stress on partner, incidental costs, major cost of injury, fire damage, cost of effect on future life, punitive damages for selling a device that was unsafe despite there being a history of such incidents and despite the fix being easy to implement.) Medical costs alone might come to hundreds of thousands.

Of course, this could be a conspiracy or a scam. It would be interesting to get the view of the local police department, fire department, hospital, and ambulance service on that. Not to mention the spouse.

Whose fault is it? I would have thought that was obvious. What is the very easy and simple fix? Equally obvious.

What will happen if the fix is not implemented? The rights of hundreds of thousands of vapers now, and potentially millions in the future, will be adversely affected.

What is the opinion of the family members of the victims? What they tell me about their feelings toward a few people who don't want to change the design of some obsolete devices cannot be printed here. The words greed, stupidity, madness and a lot of others with four letters feature prominently.

I've already stated in public that if an ECF member is injured and comes to us with a solid case that absolutely cannot be fraud, and is supported by clear evidence by the hospital and local police, we will provide whatever assistance is required in the civil suit resulting. So if the mod makers don't change, they stand to lose their house and the shirt off their back.

They'll need to change their ways or face the consequences. We are talking about a handful of people who are going to cause a stack of problems for hundreds of thousands of others. This problem has been known about for around four years now, and we have have been warning about it for two years. The EMSS is one year old now and no real advance has been made. Time to do something more concrete.
 
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pumasforpets

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What is the opinion of the family members of the victims? What they tell me about their feelings toward a few people who don't want to change the design of some obsolete devices cannot be printed here. The words greed, stupidity, madness and a lot of others with four letters feature prominently.

I think the lack of evidence to show that the changes proposed by EMSS actually function as intended and do not cause other serious issues is more of a problem to me than cost. Cutting a few slots is easy and cheap. Relying on an unproven concept could be extremely expensive when it turns out it's full of crap ;)

Prove that your concept works before you try to sell it. That should be pretty basic and obvious.


Currently, mods are built with bottom vent holes. With side slots, some may no longer feel the need to include them. What happens when a new battery that is slightly wider than the intended battery is inserted into the mod, goes thermal, expands and blocks the slots. You've now got a sealed tube.

What effect does the water and debris that can now easily get into the battery tube have on its function and safety?

What effect do jets of flame shooting out the slots have on the user?


These are but a few questions raised by EMSS...that need to be answered. If you can't answer them, you're going into this blindfolded and relying only on theory which is, simply put, not good enough.
 

tj99959

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    You mean, like testing?

    You mean, like the testing mod makers should do?

    Why should I trust the mod makers testing? We need independent testing by an entity that at least knows what a mod is.

    This modder thinks his work is really top notch .... yes he is actually selling them.

    (Pics borrowed from another public forum)
    DSC03365.jpg


    They have even been BOOM tested :evil:, by a customer of course ("but OH, they used the wrong batteries")

    photo5.jpg


    Anyone still think that there isn't a problem that needs to be addressed?!?

    Ya I know, it's hard to fix stupid!
     
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    hifistud

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    You mean, like testing?

    You mean, like the testing mod makers should do?

    If ECF is insisting on a minimum spec of "safety measures" then, surely, ECF should have the test data to back them up - and not just the theory. That rather requires that ECF can demonstrate the efficacy of its specs, else, should a mod maker adhere to the specs religiously, and it all still goes pear shaped - then who is liable?
     

    roadhoguk

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    Yesterday in the UK a female suffered 40 percent burns to her body after decanting petrol from one container to another in her kitchen while her Gas Cooker was on, it was not the petrol itself that caught fire but the fumes given off from it. Now by ECF standards that would mean instant alarm and either the Gas Cookers being fitted with spirit detectors or emergency air vents built into houses to vent fumes out at the first sniff of trouble.
    Or perhaps leave things to common sense.. I.E if your going to play tag on a firing range, don’t be surprised when you get your head blown off.

    The bottom line is this,
    ECF is a forum, a meeting place for people of the same mind to come together and chat, you are not a trade representative for electronic cigarettes and nor should you purport to be one, it is not enough to state you are *not* trying to make self regulation because by doing so, however worded.. you are, and as such can and probably will be held accountable, if after all your un-scientific & baseless assumptions still results in someone getting hurt by putting the equivalent of half a Car battery (6v) from batteries made in god knows where, but hey that’s ok, we know the problem is the battery but lets start making up stuff and killing the mod industry.
     
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    pumasforpets

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    You mean, like testing?

    You mean, like the testing mod makers should do?

    I plan to....but I'm not the one telling people how mods should or should not be built. And I certainly would not EVER try to do so without testing data to back up my claims. By that same notion, I would not ever claim that my mod can withstand a catastrophic failure without actually testing such a thing.
     

    AZCraig

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    An experienced vaper introduces a friend to vaping. He owns a particular make of mod that takes two batteries for 6 volt vaping and tells his friend that this is the way to go. He buys all the supplies himself for his friend, on his own credit card, and thus has all the receipts for the purchases and knows that this was the only equipment used and that no other materials were used subsequently by his friend. He buys the mod, the battery charger, and two sets of batteries, which are of the safer-chemistry type and what he himself uses - all from the vendor, who is also the manufacturer of the mod. His friend is very happy with the result. However a week later the mod explodes in his face, causing the most severe damages that we have full details of to date. Apparently the top end of the mod blew off into the mouth and face. (This is not the Niceville, Florida incident by the way.)

    Forgive me for focusing in on a portion of your post and not answering the questions regarding civil suits:

    Are you saying that someone used two actual IMR batteries in series in a mod and it blew up ?
    or are you saying that someone used two fake IMR batteries in series in a mod and it blew up ?
     

    Creniker

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    Roly Im not trying to be a negative nancy here, but what happens when 30 people go the newspaper with 2nd degree burns on there hand, from a mod with slots violently venting? If the aim is to stop giving the opposition ammunition, doesn't this seem counter productive? Even if it theoretically safer, doesnt mean the media wont eat it up and turn it against us.
     

    six

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    I can't get my mind wrapped around some of this. Like Creniker, I really don't want to come off as being ornery towards Roly or anyone else. There are some simple facts that aren't adding up with proposed solutions, though.

    Li-On batts blow up easy - If I had a thousand to blow up, I could have that chore complete in a couple of hours.

    IMR batts can go thermal easy - just a dead short is all they need. They don't release much hydrogen, though so they are a lot more difficult to blow up. Easy to melt - difficult to make pop/boom.

    LifeP04 batts release even less hydrogen and have a much higher thermal tolerance than any competing chemistry batt except maybe ni-mh.

    Slots in the sides of tube mods... just seems like a great way to introduce moisture and pollutants to the inside of the tube where they are more likely to cause a short or become the spark that actually touches off the hydrogen during a thermal event. Will your average, run-of-the-mill pocket lint burn easier than the casing around the battery cells? Will pollutants like that end up being the ignition source for hydrogen explosions that might not have occurred without the pollutants such as pocket lint being present?

    It's is like the round-a-bout. Round-a-bouts in the UK are very effective low-risk traffic tools. Round-a-bouts in the US are far from that. And, the last statistics i read indicate that the number of accidents in intersections converted to round-a-bout have gone as high as 300% more accidents at the same intersections. That translates to about 275 X as much property damage as well. Injuries per accident have decreased. But opportunities for injuries have increased by 300%.

    Slotting the sides of tubes makes me think of the round a bout. It might increase the chance of something going wrong by 300% and it will guarantee excessive property damage. Will it actually reduce the number of injuries? Or will it at least decrease the number of *serious* injuries?

    I think the easier introduction to water and contaminants is likely to very much increase the number of incidents. Then the design itself *should* decrease the severity of each incident. So, in effect, we would be generating lots of new incidents with design changes and hoping the severity of the injuries for the design is lower than the severity of injuries occurring in devices that we didn't contribute to the problem in. -- So, it's OK to give maybe 10,000 people minor burns on their hands and suffer whatever property damage might occur due to not being able to handle the device to get it somewhere safe to finish its thermal episide.

    So to nutshell it: Cutting slots will allow more contaminants in and will certainly allow more moisture in. That will play a major part in new episides. --- So we create a whole bunch of new episodes on purpose in the name of safety. Those result in hopefully smaller physical injuries. ... So we cause a bunch of injuries that would not have happened without the meddling and we think we can be guaranteed those injuries will be comparatively minor when considering a couple of severe incidents that happened lately.

    Buy new design mods to increase your chance of having something go wrong, but don't worry about what will go wrong because it is hopefully less severe than what could have gone wrong on a rare occasion before now. Right? let's generate a whole bunch of ways to interfere with how a mod works through adding contaminants and water directly to the batteries and the contact points. By doing so, let's actually create a brand new way to have a mod fail and hurt someone. Since it will probably only burn their hand, then all of the extra injured people should feel safer because it wasn't their faces effected.
     

    hifistud

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    I plan to....but I'm not the one telling people how mods should or should not be built. And I certainly would not EVER try to do so without testing data to back up my claims. By that same notion, I would not ever claim that my mod can withstand a catastrophic failure without actually testing such a thing.
    You see, this is where VTTV more or less came in. Our take on it was that, when we were reviewing mods, it might be a service to the viewer to be able to show what would happen to that mod in thermal runaway conditions - or at least, how it would cope with a series of faults (dead shorted atties mismatched batteries etc.) and so on. We thought it better to show real world scenarios, with real batteries in a real situation, and not just air hoses. So we have been trying to make the batteries people use go thermal - so far, with no success, and that includes a fake IMR...
    Perhaps this is the problem - perhaps ECF can't show test results because they cannot make it happen. In which case, is there really a problem with the mod?
     

    Creniker

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    I can't get my mind wrapped around some of this. Like Creniker, I really don't want to come off as being ornery towards Roly or anyone else. There are some simple facts that aren't adding up with proposed solutions, though.

    Li-On batts blow up easy - If I had a thousand to blow up, I could have that chore complete in a couple of hours.

    IMR batts can go thermal easy - just a dead short is all they need. They don't release much hydrogen, though so they are a lot more difficult to blow up. Easy to melt - difficult to make pop/boom.

    LifeP04 batts release even less hydrogen and have a much higher thermal tolerance than any competing chemistry batt except maybe ni-mh.

    Slots in the sides of tube mods... just seems like a great way to introduce moisture and pollutants to the inside of the tube where they are more likely to cause a short or become the spark that actually touches off the hydrogen during a thermal event. Will your average, run-of-the-mill pocket lint burn easier than the casing around the battery cells? Will pollutants like that end up being the ignition source for hydrogen explosions that might not have occurred without the pollutants such as pocket lint being present?

    It's is like the round-a-bout. Round-a-bouts in the UK are very effective low-risk traffic tools. Round-a-bouts in the US are far from that. And, the last statistics i read indicate that the number of accidents in intersections converted to round-a-bout have gone as high as 300% more accidents at the same intersections. That translates to about 275 X as much property damage as well. Injuries per accident have decreased. But opportunities for injuries have increased by 300%.

    Slotting the sides of tubes makes me think of the round a bout. It might increase the chance of something going wrong by 300% and it will guarantee excessive property damage. Will it actually reduce the number of injuries? Or will it at least decrease the number of *serious* injuries?

    I think the easier introduction to water and contaminants is likely to very much increase the number of incidents. Then the design itself *should* decrease the severity of each incident. So, in effect, we would be generating lots of new incidents with design changes and hoping the severity of the injuries for the design is lower than the severity of injuries occurring in devices that we didn't contribute to the problem in. -- So, it's OK to give maybe 10,000 people minor burns on their hands and suffer whatever property damage might occur due to not being able to handle the device to get it somewhere safe to finish its thermal episide.

    So to nutshell it: Cutting slots will allow more contaminants in and will certainly allow more moisture in. That will play a major part in new episides. --- So we create a whole bunch of new episodes on purpose in the name of safety. Those result in hopefully smaller physical injuries. ... So we cause a bunch of injuries that would not have happened without the meddling and we think we can be guaranteed those injuries will be comparatively minor when considering a couple of severe incidents that happened lately.

    Buy new design mods to increase your chance of having something go wrong, but don't worry about what will go wrong because it is hopefully less severe than what could have gone wrong on a rare occasion before now. Right? let's generate a whole bunch of ways to interfere with how a mod works through adding contaminants and water directly to the batteries and the contact points. By doing so, let's actually create a brand new way to have a mod fail and hurt someone. Since it will probably only burn their hand, then all of the extra injured people should feel safer because it wasn't their faces effected.

    Agreed. My biggest problem with the slots is the allowance of moisture to reach the battery itself. I will NEVER buy a mod with slots for this reason. Its just a foolish design. And I will ALWAYS recommend against someone buying a slotted mod, even if it means the removal of myself from this forum. Sorry if that comes off as "snippy" but it just seems like one of the most dangerous designs Ive ever seen, and there's no way I can endorse that.
     
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    rolygate

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    Forgive me for focusing in on a portion of your post and not answering the questions regarding civil suits:

    Are you saying that someone used two actual IMR batteries in series in a mod and it blew up ?
    or are you saying that someone used two fake IMR batteries in series in a mod and it blew up ?

    IMR - Li-Mn cells - are not the only type that can be called 'safer-chemistry', Li-FePo4 or 'Li-Fe' also fall in that class. In fact, according to many sources, these are the 'safest' of all.

    In the incident we are talking about, I was told that Tenergy Li-Fe batteries were involved. No doubt they were fakes, as real Tenergy cells are shown to be very good quality in recent tests. Apparently, counterfeit Tenergy batteries are now common and there is no way of telling if they are genuine or not from the label.

    Vendors are probably doing the right thing by suppling Tenergy batteries for series use (though there may be better choices), but only if they buy from a main distributor. Cheap Tenergy batteries are a risky proposition - they could be stripped and re-covered reject unprotected Li-ion batteries, the worst possible choice for stacking.
     

    rolygate

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    My opinion is that if we can expect the mod makers to implement safety measures, we should approach the battery manufacturers to do the same. I know I would pay more for a good battery. :)

    It is impossible to prevent faulty batteries being inserted in mods.

    No matter what is done, by whom, at whatever cost - dud batteries will be stacked in mods by somebody somewhere.

    There is a simple, easy fix: large vent holes in the tube body. There are better engineering solutions - but the idea that all mod makers could comprehend how to actually engineer a safer metal tube mod, or wanted to implement such improvements, or would not try to cut corners, or could construct effective gas vents other than slots that can be instantly checked for veracity by a buyer, is plainly ridiculous. However if a manufacturer comes to us with a mod design that is obviously well-conceived and well-built, we might offer an exemption.

    The gas vent slots are offered as a simple, easy fix that any mod maker can implement and that are easy to check. There are certainly better solutions - but some makers can't be trusted, and these other options are hard to verify by the buyer of the product. The slots can be part-filled or covered in such a way as to prevent ingress of foreign materials/water if for some reason a slip case for the mod is not sold.
     

    rolygate

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    Roly Im not trying to be a negative nancy here, but what happens when 30 people go the newspaper with 2nd degree burns on there hand, from a mod with slots violently venting? If the aim is to stop giving the opposition ammunition, doesn't this seem counter productive? Even if it theoretically safer, doesnt mean the media wont eat it up and turn it against us.

    This is a valid point.

    What we have been forced to do is:

    1. Warn that in three months time we will be issuing strong cautions to our members in order to protect them.

    We have to tell members they need to be very careful when buying some types of metal tube mods. We have to do that as it is our duty. In fact we should be doing it now, and if we are accused of neglect here, that is a difficult accusation to respond to as around a month ago it became clear that we need to do this.

    2. Offer some sort of guidance on safety features that can be implemented in order to prevent a mod from blowing up in the user's face.

    It's obvious that nothing will be done about this by some makers. They will eventually be removed from the trade by civil suits for damages, which will bankrupt them since it must be difficult or impossible to get product liability insurance for these products. (They might pay for insurance, in some cases, but that is a very different matter from getting paid out. There is a clear case here for an accusation of negligence - this issue has been known about for four years, and we have been warning about it for two years.)

    From anecdotal reports a violent battery failure might occur for 1 in 3,000 to 1 in 5,000 (at most, 1 in 10,000) mods of the particular type affected (metal tube mods that can have two batteries inserted, have no electronic controls, and appear to be gastight on quick inspection). Some mods will survive such an explosion intact, and some won't.

    Very strongly built mods with small gas vents may survive an internal explosion, there is plenty of anecdotal evidence for this. Some mods won't; and worse still, some have weak top ends that blow out first.

    The users are at risk of serious injury from an explosion in front of the face. Or, in some cases, of a burnt hand. We think it likely that facial injury will attract more negative press. There are alternatives: first-class engineering alternatives for example. This is beyond the reach of some mod makers, not to mention that they are not interested.

    It's a question of whether we try to reduce the numbers of facial explosions, or wait till the mod makers responsible are removed by bankruptcy. It seems a better choice to try and reduce the incidence of serious injury instead of letting nature take its course.
     

    rolygate

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    I can't get my mind wrapped around some of this. Like Creniker, I really don't want to come off as being ornery towards Roly or anyone else. There are some simple facts that aren't adding up with proposed solutions, though. ........................

    Slots in the sides of tube mods... just seems like a great way to introduce moisture and pollutants to the inside of the tube where they are more likely to cause a short or become the spark that actually touches off the hydrogen during a thermal event. Will your average, run-of-the-mill pocket lint burn easier than the casing around the battery cells? Will pollutants like that end up being the ignition source for hydrogen explosions that might not have occurred without the pollutants such as pocket lint being present?

    Slotting the sides of tubes ............ might increase the chance of something going wrong by 300% and it will guarantee excessive property damage. Will it actually reduce the number of injuries? Or will it at least decrease the number of *serious* injuries?

    I think the easier introduction to water and contaminants is likely to very much increase the number of incidents. ..........

    OK - but two things should be considered here:

    1. Facial explosions will continue unless something is done. They might even increase. Many incidents have been caused by misuse or mistakes by the user, but inevitably some will be the responsibility of the manufacturer.

    Example 1: a mod owner mixes up RC123 primary cells with his rechargeables, charges them, inserts them in the mod stacked for 6v, it explodes. The user's fault.
    Example 2: a mod owner gets mixed up over what batteries to use, at least 50% due to a series of errors by the manufacturer/vendor. The user buys unprotected Li-ion batteries, charges them, inserts them in the mod, it explodes. Mixed liability between user and vendor - probably 75% vendor - 25% user in that particular case.
    Example 3: a buyer gets the mod, charger and batteries from a vendor who is also the manufacturer. He uses it entirely according to the instructions. It blows up in his face causing serious injury. The vendor's fault. Negligence and punitive damages are also a possibility as there does not seem to be any way to disclaim liability or deny negligence.

    2. If these explosions continue, the legal implications are massive. Exactly what is being suggested as the alternative? This I don't understand. Doing nothing is not an option. Don't people understand this?

    As regards the technical solution, due to the nature of some of the mod makers involved, it has to be simple. Big holes in the wall of the tube will stop it exploding. We already have numerous rocket mode fails where the batteries swelled and jammed in, but did not explode the casing because a bottom cap blew off. If we cut holes in the tube wall that have considerably more cross-sectional vent area than the tube bottom end, then there is a reasonable expectation that the same non-explosive event will occur, with the added benefit that thrust vectors are balanced, so a really strong rocket effect is far less likely than with a blowout plug.

    Again, nothing will be done unless pressure is exerted on manufacturers to make changes. And once this process starts, both ways of improving the suggested features, and better solutions entirely, will be suggested. Nothing happens without pressure.

    For example suggestions coming in are: a good slip case can be supplied with the mod; or the vent slots can be filled, leaving small vent holes, with some sort of material that will blow out; or an internal sleeve can be used; or an external sleeve can be used.

    This does not exclude better solutions from the process: there may be better ways to engineer gas venting. The problems are that not everyone could build it, and it cannot be checked by the buyer.

    One possible solution is: a chain of small vent holes running the entire length of the tube, with a low-pressure blowout plug. You have to dump gas pressure from the top of a blocked tube, so if slots are not going to be used (which extend to the top, which is one of their big advantages), then larger holes will be needed at the top. Plastic threading can be used on the blowout plug, or it can be made from ali and brass and have the blowout pressure tested. There are issues here with the negative circuit; also with the probability you will have a rocket-mode fail.

    On the other hand, completely new designs would be much better. These could even be very simple: use box section ('square tube'), as the gas venting is then integral, the tube is unlikely to be blocked by a swollen battery.

    We already listed some possible exceptions from the EMSS. If a good design improvement is provided, we would consider exempting it and publishing that fact. Better designs are needed, we certainly aren't trying to stop them.
     
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    buGG

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    ...We already granted some exemptions from the EMSS. If a good design improvement is provided, we would consider exempting it and publishing that fact. Better designs are needed, we certainly aren't trying to stop them.

    Roly, have there been additional mods/ devices that met these exemptions, or are you speaking of theoretical exemptions that might be met in the future?

    Also, under the "Exceptions" of the EMSS, it states:

    5. Completely new mod designs with innovations such as internal vent channels (and provision for equalising the venting gas thrust directions so that a rocket-mode fail is not caused) may well be completely exempt from EMSS. An example of the new design must be presented for inspection in order to receive an exemption.

    but then after listing the appropriate language for vendors/manufacturers to use once compliant with EMSS, it says:

    ...or similar. This is because we have not inspected, tested and approved it. ECF cannot test and 'approve' any product, it is not a testing authority. We will list it as complying with EMSS.

    So what are the ways in which completely new designs, or other conceivable "exceptions" can be properly appraised (if not outright inspected) for compliance by way of exemption from the EMSS?
     
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