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Old 04-30-2013, 07:38 PM   #31
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From what I'm reading, the first question should be:

Did you charge higher than recommended?
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Old 04-30-2013, 11:55 PM   #32
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To be honest, I find it odd to race a big meet where you require like $100 ROAR packs, yet you can charge them with a $20 charger off ebay, it seems like a safety loophole of sorts.

The lure of cheap chargers when your starting though is strong, though people not balancing packs has worried me since the start, and seeing a bank of batteries being charged from a rough looking four channel, all linked with alligator clips or those seriously suspect multi charge leads freaks me out, more time than I care to remember I have seen those multi charge leads short and burn to a crisp.
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Old 05-01-2013, 02:55 AM   #33
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To be honest, I find it odd to race a big meet where you require like $100 ROAR packs, yet you can charge them with a $20 charger off ebay, it seems like a safety loophole of sorts.

The lure of cheap chargers when your starting though is strong, though people not balancing packs has worried me since the start, and seeing a bank of batteries being charged from a rough looking four channel, all linked with alligator clips or those seriously suspect multi charge leads freaks me out, more time than I care to remember I have seen those multi charge leads short and burn to a crisp.
What was the actual cause of Friday nights lipo explosion?
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Old 05-01-2013, 05:23 AM   #34
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What was the actual cause of Friday nights lipo explosion?
It was a 4s LiPo being charged by a cheap four channel charger, without the balance lead connected, it was actually in a LiPo sack that simply blew apart, my guess was always either charger fault, or simply the pack dropped a cell, from memory it was also a hobbyking pack, and while some of their packs are good, their 4s packs are fairly average.

I have used a couple of the hobbyking 4s packs for starter box batteries, if you don't balance charge them they go seriously out of balance even when fairly new, some are better than others though.
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Old 05-01-2013, 07:26 AM   #35
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To be honest, I find it odd to race a big meet where you require like $100 ROAR packs, yet you can charge them with a $20 charger off ebay, it seems like a safety loophole of sorts.

The lure of cheap chargers when your starting though is strong, though people not balancing packs has worried me since the start, and seeing a bank of batteries being charged from a rough looking four channel, all linked with alligator clips or those seriously suspect multi charge leads freaks me out, more time than I care to remember I have seen those multi charge leads short and burn to a crisp.
This is true, I have seen ppl using them very cheap chargers at my tracks and they don't even have a balancer...but I think that is why they had puffy cels, and I have even seen ppl using an old prophet sport nimh charger...the ones wi just one button on the top!!! I was just [email protected]#%* stay the #%*&@ away from me hahaha
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Old 05-01-2013, 09:30 AM   #36
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The guy robertcooper was talking was using a gfx which is no cheap charger
FALSE. He was not using a GFX.
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Old 05-01-2013, 10:12 AM   #37
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Here is what I have seen (condensed version) in 40 years of RC racing:

NICAD & NIMH packs have exploded and sent shrapnel flying into the air. Lipo packs have smoked without flaming, Lipo packs have flamed as well.

Many racers are not careful about storage, charging, discharging, and transportation of Lipo packs.

Now post office asks if there are Lipo packs in boxes you are shipping; this is in addition to the other "dangerous" things they ask about.

Packs (of any kind) should not be stacked, stored, or transported when touching each other or if they can touch anything metal (due to possible dead short).

Many Lipo bags do not offer adequate protection.

Metal storage bins lined with asbestos are better but not fool proof.

Anything can happen and usually does (I think that is a Murphy's law).

BE CAREFUL

As far as incidences:

Racer placed a Hobby King soft pack on his pit table. It was a two cell, 30C, 1800, small (physical size) Lipo with Deans plug. It had been charged at 1C, never over charged or over discharged. He had run it the week before. I heard a hissing sound and saw the pack start to smoke. We took it outside and it continued to hiss and blow white smoke for 30 minutes. No explosion, no flame, but it could have set his pit mat on fire if he hadn't taken it outside.
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