andon

Area where it has to rest is not large, as it is close-by to a sort of dam. But - at least on something already - I've decided not to touch it by myself, at least for now, b4 I collect enough info.

Yep, I guess I've already gotten over the hope that it can be restored. Now it's a question how to get it out safely. I'll find a solution to this, though.

Thank you. According to first study, after 95 hours of submerging 18650 Li-ion bat. in mild saline solution, it showed no less than 1.7V right after taking it out of the water, to gain another +-0.6V afterwards... They say: This is a finding that has not been discussed before in this context and one that represents a serious hazard in recycling facilities. So they repeated this process of sub- and emerging until, after relaxation, it showed ca. 2V, which is low enough for safe shredding of LIBs. And now: it took them 900 hours to get there... Let's remember, we're talking about a single cell, not a pack, wrapped tightly with foil AND a saline solution, not pure water in which discharge will take a lot (we don't know how much) longer. Second study you have kindly posted focuses on many different solutions in which single cells are bathed, but there is no comparison to the analogical process in pure water. They say: Given that the rate of discharge should be strongly linked to conductivity - it translates into: low rate of discharge in pure water. Still talking about a single cell, not a pack of 40... In the end they relate to fire hazard: Nevertheless, the hydrogen will not spontaneously combust unless there is at least 4 vol% of H2 in the gaseous mix. 4% represents the lower limit for upward propagation of a flame through the mixture; for horizontal propagation this limit rises to 6%, and for downwards propagation it is as high as 9%. (...) Given the need to be conservative with health and safety, a strict upper limit of 4% H2 must be observed to ensure safety, which will require a good ventilation system. So - if I get it right - the risk of spontaneous combustion appears beyond 4%H2 in the air, so - theoretically - with constant ventilation, i.e. a large fan - it shouldn't blow? But how to do it?

I had visited fire station today and talked to another ff, he advised the same: call 112, as they are supervised by them. Yet I want to talk to a fireman with similar experience b4 I do it or have them do it. Water is cloudy, you can't see anything. Hey, yes, it's not transparent. Before I take it out of the water, I want to be absolutely sure it won't pose a danger to me. Thank you. It's a 1 hour drive. I'm not touching it b4 being certain it is safe. I have a cat that depends on me, sorry...

I will not leave it there. I talked today to 3 firefighters, but the weren't of this field, so didn't know how to deal with it. Tomorrow I will visit another fire station. Thanks.

I've read almost all of it, thank you, as it is very important. So yes, there is no 100% answer if it would be safe after take-out. Getting to the battery (unscrewing) takes time, and it is a dangerous time-window. In their case, after 24 hours of immersion there still was 50V in some of the batteries, what may lead to a "thermal event". From this disassembly video by Ecodrift that @meepmeepmayer posted, batteries in 16X seem pretty well sealed, meaning it can a long (unknown really) time for them to discharge fully while immersed. So, the longer my ex-wheel stays there, the more likely it won't blow upon or shortly after emerging it, yet still there is no certainty. Thank you all for your support, joint brain-storm with good intentions is what is quite rare these days, it is great being here.

@The Brahan Seer I'm reading it carefully.

@Robse Wow, thank you very much for this movie, as it referred also to this old way of doing it, I wasn't really aware of the facts. It seems ca. 1 meter (3 feet) is max to be able to take a breath. So I would just have to emerge from time to time while scouring every sq. meter with my hands inbetween, as visibility there is non-existent. Maybe the wheel won't be covered in ooze (silt) yet.

Back then it wasn't (there was no such thing at the time), nowadays yes.

Are you sure, Robse? In one of my favorite movies (based on facts) - Le Grand Bleu - with Jean Reno, one diver was wearing a special, old fashioned helmet on his head with a super long pipe on the top that allowed fresh air from surface while he was diving.

Guys, I have a concept on how to take it out: a snorkeling mask and a pipe with attached another, long and flexible pipe to keep me breathing. And a long rope to wrap it around the handle and pull it all out. It can be done. The main question is: are batteries (from last friday) 100% empty not to cause fire after emerging the wheel... How can I be absolutely certain of this? Do you have a clue?

@EUC Custom Power-PadsThank you very much, Frank, much appreciated. As soon as I resolve if - and if yes, than how to do it, some leftovers will be acquired, pedals and pads from you for sure. Thank you for your kind offer. Sure, if you can ask him, that will be good to know. (I can finally edit posts) By the way: you've used the word consolation - in Polish konsolacja is a term used to name a ceremony, gathering of a family and people close to a deceased one after a funeral... @Robse yep. @Paul g Now I will remember about it indefinitely!

Thank you all for a great response. I will allow myself to extend this post a bit, as I didn't expect such a feedback from our community. @earthtwin I didn't want to leave it there mainly due to ecological influence, as battery may (possibly, I am not sure yet), leak eventually, and there are ducks that visit the pond. I've watched a video by someone getting out of water a Xiaomi scooter that has been resting there for a year. That is also why I need a view from a fireman on it. All electronic parts either to be replaced or re-soldered with new components, battery new, so makes no sense. @alcatraz I got my 16X ca. 5 weeks ago, used, but with only 160 km on it, battery in great shape (allowed me to once do 99 km with 4% left, 0.13 ohm internal resistance), so this time used one turned out to be a great choice. But with suspended ones (as - if I was to buy a monoC again - I would probably look for one), more things can go wrong and, possibly, they may receive a more cruel usage, due to being more off-roadish, so I would rather look for a new one. For now I can think of NyloNove pedals I've recently installed that would remain intact out of this unpleasant situation, maybe external body covers as well. I want to be 100% sure first, that it will not blow, hence I will consult a fireman - today I visited an FD nearby, but there was nobody there... It's a voluntary service, that's why, still quite funny. @Cerbera Thank you. As for leashes, both before and right after this event I thought about one, but in this particular situation, high chances that I would have been dragged along with the 24 kg wheel right into the water, as there was nothing to hold on to, and a cement decline in this very spot was steep and slippery enough to cause it; everything happened in about 3 seconds. As for using/selling submerged parts, I agree, I wouldn't want to test it on myself or anyone else for that matter, hence my initial question was considering a chance that anyone has successfully revived an EV in such a case to make sure, but as I looked upon a few clips, I gave up on the idea. Pedals will remain untouched for sure. @sbb A pinch of a good humor goes a long way. @Scubadragonsan I agree, so - if i decide to get it out - it will be not with the help of authorities for sure, as they only make things more difficult for us people. @Robse Thank you. I've really taken care of it until shtf. The wheel allowed me to experience new things, as - instead of traveling from point A to B with a car - I could travel through new, often unknown before areas - parks, trails, estates, all the nooks and crannies. As I live outside the city, I put my wheel into the trunk and within city limits I would use it instead of the car. And the greatest thing associated with the wheel was - and it may tilt the scales in favor of a new purchase - that I had been able to initiate a conversation with "strangers", kids as well, because the wheel naturally was catching their attention as sth. in most cases unseen b4; at least a few such encounters every time - like a messenger from a different dimension riding a flying carpet. Not to mention it helped with a rehab of my broken lately thigh bone. The wheel is not visible - deep enough and water cloudy/not transparent at all. Doesn't sound stupid to me as my idea was the same. After a talk to the fireman I will make the decision on what to do with it. To be fully straight with you all - it could have been avoided, even twice-fold. Firstly, I asked my inner voice: right (wider, asphalt path going up) or left (90% asphalt, but 10% narrow trail with steep, angled end). And reply was: right. If only I knew. But I thought: I will go left, as there were quite often students or other people around the pond - so I went left. And secondly: it was second time I would pass this point on my ks, and first time it also was risky, but only falling from the wheel would come to my mind and at very low speed and not wheel falling into the water. Still, to make sure, I could have just walked these few meters trolley-style instead of being on the wheel. I am only beginning to learn gratitude for certain things and this is a fine opportunity - easily I might have slipped along with the wheel or even broken my ankle or wrist even before diving there unwillingly. So still it could have been far worse (like in this fine '85 Swedish movie "My life as a dog"). And if only I had listened to my inner voice, I wouldn't have ever known, what could have happened in the first place. But hey. I have received an unexpectedly nice response here from you, so - as always, only depending on the timeframe - from evil/bad comes good, eventually. And who knows, maybe there is some hidden merit to it as well. Eventually, it was not the first time a similar - barely imaginable - situation happened to me.

I meant fireman in terms of diving in the pond with some equipment - a line with a hook maybe - as the pond (kind of city lake) is quite large and deep and water cloudy, and securing it from possible fire hazard as well; I want to consult a pro, maybe they already had a similar situation. Thanks for your advice, meepmeepmayer.

Thank you. For now, I am not able to get it out anyhow, I will soon be consulting a fireman, on what to do with it - I do not want to leave it there, not too elegant a behaviour. It is hard to imagine how I could disconnect batteries right away, risking a fire in the face while disassembling it, though. I really took took care of it, babying the batteries, and all, funny how life can be. So if there is no 100% method of making it reliable again, I wouldn't want to risk my health riding it after this. As to then new one, I still got my first Ninebot One S2 to support my basic needs, and KS was worth more than my monthly income, so I guess I will pause for now. But no one will prohibit me from scrolling suspended wheels ads, of course...