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Just got my batts out yesterday, and noticed one was a bit bigger than the others :o

Came across this, one cell has puffed up, and somehow hasn't gone boom. Lucky, as it is stored in my bedroom, in it's original box, next to my bed!

God only knows what would've happned if it had decided to go up properly. It wasn't stored flat, and was kept at room temp. It was in its box with nothing else so couldn't have shorted, nor got wet.

I guess these things just happen. The important thing to remember is that we use lipo sacks for a reason! I have now gone and put my remaining lipo's in my charge sack, and sealed it when storing them.

Quite frankly this has scared the sh1t out of me now, and I would urge everyone to just have a think about how their packs are stored and what would happen in a worst case scenario.
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HERBAL VAPORIZERS

how long since you put it away has that happened?

Holy crap, i dont have a charging sack didnt even know what one as lol.

Ill have to go get one when I get a free moment, whats the safest way to store my lipo batt till then?

Just bang some insulation tape around it and it'll be good to go again:woot:. On a serious note tho, one day a lipo will go bang and cause injury to someone then i wonder what action would be taken. Might be worth a claim from the no win no fee gang.

I heard they have self extinguishing properties - how effective this is I don't know, its to prevent fireballs. And when they do this they expand and go to zero voltage.... Early Lipo's didn't have this, when i say early, I mean 6am.... no I really mean 6-12 months or so BEFORE the BRCA allowed them into nationals.

Just to set your mind at ease...

http://www.bbc.co.uk/news/world-us-canada-11505505

;)

I think the company would argue that the product has been misused therefore the injured party would be the "author of his/her own misfortune".

I agree with your point, but i bet 95% of the time these batteries are being treated with the upmost respect.

Crossing the road ia danjerous .......


Now you claim could be true but..... you have had no fire and no injury.


I would have said the pack look lile its been low discharged. Which has caused swelling. When pack swell you don't nesacerally get fire when its low currents.

Two questions

What state of charge do you store them at.
Do you balance charge them.

I never balance charge my Lipo's

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Always balance charge, and generally store them between 70-90% ish.

I am going to shoot it tonight with my airgun in the name of science. Just to see what happens.
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Honda Shadow 600 specifications

please video this!!

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already there my friend....... :D
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Ferrari 360 Specifications

top banana :thumbsup: not that I endorse such dangerous and reckless behaviour.... just make sure we get good flames!!

Spooky Lloyd, i had one swell up on Sunday at Worksop??

Lloyd could it be that they are old and foooked?

The title of this thread should be, "BATTERIES are dangerous."

Inherently, all batteries are vessels for storing electric energy and are by nature VERY DANGEROUS. Too many people overlook this fact of racing and playing with electric powered cars, boats, helicopters and airplanes.


The simple truth is that NiMh and NiCd have always been and are still just as dangerous to own, store, charge and use as Lithium Polymer type packs. Ever see a NiMh cell EXPLODE or shoot across the pits and lodge into a wall, table or worse?





I am still amazed when people spontaneously realize that stored electricity is dangerous, in any format. Take care of your batteries, store them properly (according to the manufacturer's suggestions) and treat them with the respect they deserve.

LiPos are not any more or less dangerous than the batteries under the hood of your car, in your cell phone or in your laptop. They just pose different risks and require different maintenance. They are certainly not any more dangerous than the batteries we have been using in R/C cars for the last 30 years.

Agreed, it's way to easy to take batteries for granted. I blew up a set of Sanyo cells years back (the old non-vented red ones) by shorting them out in a battery box by accident.

Just recently we had a NiMH pack explode in a guys starter box at a Nitro race. Switched the box on, big bang and smell of burning. Fortunately the metal starter box contained the shrapnel, but he did need new keks afterwards:woot:

I've seen a LiPo go up at a race meeting - it's not funny at all. In fact, the speed in which the fire took was truly a wake up call to everyone that was there.

It is true to say that all batteries (in fact all stored energy) have some form of danger attached to them. However, generally speaking, with a NiMh, you get an explosion. Nnot nice, but once it's done, it's done. With LiPo, you get fire, that continues until someone puts it out - and the smell afterwards is nothing short of horrific.

I don't mean to make everyone too scared to use their kit, but you do have to be careful.

we had two go up in the east mids this year due to being punctured . nothing left ot the cell or casing afterwards

I've seen people state that lipos are only good for about 100cycles, what is liable to happen to them after that?

I`ve been told that lipo`s swell up if the current drawn is more than the cell pack gives. I`ve had a few get warm that way. and since bought higher rated cells. No probs after that:thumbsup:

they loose performance

bear in mind 100 cycles is 100 full to empty, or empty to full as one cycle so if u top up 50% each charge ur should get 200 cycles

you westbridgeford guys are close

loyd is on a bout his wood and his blunt chopper and you got a swelling :D


well point two is defo correct now :woot: or u talking bout loyd :wub

All batteries carry the same risk, but not the same danger. All LiPo drive batteries should be stored and charged in a sack, as they have more stored energy than a small receiver pack, 'phone battery, etc.

And while we're on the subject of the ambulance chasers, and no-win-no-fee, they'll have got lots of useful information about how responsible RC people are(n't) from this thread. Everything you say these days comes back to haunt you, especially if you say it on line. ;)

I agree :thumbsup:

:woot:

[QUOTE=Captain-Codpiece-The-2nd
I am going to shoot it tonight with my airgun in the name of science. Just to see what happens.[/QUOTE]

Someone beat you to it. Your going to need a machine gun as well.

That 5% is your problem then :eh?:

Yep, i like to charge mine at 10amps and repeak them at least 3 times before my race, you cant beat the fizzing and popping sound they make.

I hav ebeen following and reading this thread unfortunally the time has come to speak out about batteries and the safety;

All batteries carry a safety issue with them the same as you crossing the road in the same place everyday;

All it need is 1 stupid mistake and that is it the accident is going to happen

3 years ago i was working on a team members car when there receive pack completley exploded and this not only took my sight but severley burnt my face to;

After weeks of hospitlized and numerous operations i can carry on with my every day life and still love what i enjoy and thats racing even with 75% sight in right eye 45% in left eye with diffucult complications;

What i am saying is whether it is nimhs ni cads or lipos you as the right full owner must treat and look after these with respect if you are going mis abuse them then you are asking for trouble;

Please enusre you discharge and charge on recommended amps use lipo sagfety bag if using lipos and just be sensible we all know the rules and charging limits so ask yourself this

WHY DO THE OPPOSITE TO WHAT IT TELLS YOU TO DO;

As i can assure you the team that was me the evening of the accident will tell you the do;s and dont;s as they would never ever want to see any 1 go through what i did

Crtpormachine

any cell is dangerous if mistreated, if lipo was so dangerous would we be using it??

have to say this though, ALWAYS balance charge, you are protecting yourself and the pack by doing it.

i shorted, overcharged and shot a dying lipo cell and it did little more than smoke, they will catch fire, but it aint easy, the cell needs to be well charged and either greatly overheated or punctured. nicad will also explode and catch fire, from personal experience when a charger failed to cut off back in the good old days.... nimh cell went up at the club two weeks ago. in short anything that provides energy and gets abused is dangerous. treat your cells like a can of petrol!!