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Post by Kjones on Aug 9, 2013 23:32:10 GMT -5
I just purchased a Lipo battery from ebay (new) once I received it I charged it up and then changed to connector on my gun to match the battery. With a fully charged battery I plugged it in a shot off a few shots to see the ROF, I was happy and loaded up a mag and shot about 30 more shots, then all of a sudden a hissing sound and a spew of toxic black smoke started pouring from the stock of my gun. I acted fast and yanked the bitch out and ran through my house and tossed it out the front door onto my walkway. It proceeded to burn for about 30 seconds, the heat was tremendous, I could feel it from 7 feet away. After about 5 minutes I figured I would move it to a better location and went to pick it up, it was still blazing hot, I could feel the sweat on my finger tips sizzle on the battery, So I left in my walkway for the next 10 hours since I had to go to work. When I returned it was in the same condition as I left it but cool. Only 1 of the cells melted down and the other one was still intact besides some burn marks. The battery was a 7.4v 4500 Mah 30c with 45c burst. I am not sure what caused the melt down since it did not blow my 30 amp fuse and I did not hit or crush the battery in any way. I just assume something went wrong in the manufacturing process. There was a 4 hour difference between charging and shooting too so I don't think that has any cause. If you have never had the pleasure of having a LiPo melt down on you then you are lucky. That smoke is horrible and is pretty toxic, I had to leave my house and let it air out for a few hours. I messaged the seller in hopes of getting a refund or a replacement. ( only cost me $24 with shipping)   |
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Post by Myers on Aug 9, 2013 23:56:29 GMT -5
Sorry, I HAD to Kjones. Shitty experience though, mate.
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Post by Squirrel on Aug 10, 2013 0:27:45 GMT -5
Yep... runs to make sure lipos are in lipo safe bag inside of a metal box sitting on a non-flamable surface.
That sucks for sure. I had a cellphone lipo bulge and overheat a few years back. So far I've been lucky with my airsoft batteries.
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Post by Da Vinci - Да Винчи on Aug 10, 2013 1:09:46 GMT -5
Not all those LiPo sacks are safe, though.
I accidentally left a 7.4v LiPo on my smart charger over night, however it seems that it didn't affect it at all. Some LiPos are complete crap, so make sure you buy from a good brand, but the truth is they're much safer than traditional NiMh and WAY safer than NiCd batteries.
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Post by Phantom Reaper on Aug 10, 2013 1:15:11 GMT -5
Not all those LiPo sacks are safe, though. I accidentally left a 7.4v LiPo on my smart charger over night, however it seems that it didn't affect it at all. Some LiPos are complete crap, so make sure you buy from a good brand, but the truth is they're much safer than traditional NiMh and WAY safer than NiCd batteries. I'm curious to know how they're safer then the common NiMh batteries, As far as I know I don't have to make sure they're a certain temperature or worry about them catching fire like LiPo's. |
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Post by Da Vinci - Да Винчи on Aug 10, 2013 1:25:10 GMT -5
Any battery can catch fire, what kind doesn't matter. If you properly maintain, store, charge, and use a battery how it should be used, then you shouldn't have a problem. Exceptions can be made, of course, for the quality of the battery and the strain it's put under.
However, LiPos are actually more resistant to temperature changes than NiMh and NiCd batteries, and even better than LiPos are LiFePo4 batteries, which haven't yet made it into the airsoft market.
Trust me when I say I used to be afraid of LiPos just as much as others, that having one in my gun would rip it to shreds through some mystical electrical power, but they don't. They're just as much a battery as other larger cell packs, and they're more up-to-date and safer than them, too.
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Post by MayhemXXXFrosty (AndrewMp5k) on Aug 10, 2013 1:33:28 GMT -5
I've had NiMh's blow up on me, so far my current Li-Po's have been good. My first two on the other hand haven't.
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Post by Phantom Reaper on Aug 10, 2013 1:41:19 GMT -5
To each his own, I'll stick with NiMh.
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Post by Kjones on Aug 10, 2013 1:42:19 GMT -5
I just got a reply from the seller, seems like a good guy and is going to give me a replacement. I am happy to see people do the right thing
From the seller: anjello009
Wow!! Thats a nasty meltdown.. I have been around the RC hobby for only a few years and we have a personal collection of about 30-40 different batteries, but I have never seen that happen. It must have shorted out somehow. I wish i could send you another 4500mah but I only have a 4000mah 40C battery, which sells for the same price and is a little wider, but a little shorter. I could send it to you as a replacement or give a refund. Its your choice. Let me know.
Makes me want to purchase more things from him in the future, he has great prices on his batteries, I assume I just got a round of bad luck and got a faulty battery.
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Jeff
New Member
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Post by Jeff on Aug 10, 2013 6:56:57 GMT -5
Nice safety reminder. After charging hundreds of batteries without incident, we have lost some of our discipline around ALWAYS using the the bag with lipos.
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Post by Squirrel on Aug 10, 2013 8:27:10 GMT -5
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Post by snafu on Aug 10, 2013 8:50:51 GMT -5
Never be an idiot and cut both wires at the same time on a new battery. It makes fire and worries squirrel to the point that he makes me keep the blown one outside for a few days.. I shouldn't wire stuff to Deans without any sleep late at night.
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ctres
New Member
Posts: 955
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Post by ctres on Aug 10, 2013 9:06:15 GMT -5
Care to tell us what brand this lipo was? I see it say hunger on it, but that's about all I can see.
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Post by Kjones on Aug 10, 2013 12:10:51 GMT -5
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Post by Da Vinci - Да Винчи on Aug 10, 2013 14:21:37 GMT -5
You sure that's a real Nano-tech? The ones I have look much different, and actually say "Nano-tech" on them, not "Nano-technology". I'd be cautious that it's a copy.
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