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Old 10-03-2009, 05:15 PM   #16
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Some interesting data.

http://www.hobbytalk.com/bbs1/showth...=264228&page=9
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Old 10-03-2009, 05:27 PM   #17
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Originally Posted by microcrazy24 View Post
how do you test the c rating?
you seem to be tight with the guys at rctvlive.com why do you have them test the batteries

that may not be a bad idea. hook up with those guys and the magazines. car action i am sure could afford to do some tests.

i think it is a bunch of crap that an organization has the information but will not share it.
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Old 10-03-2009, 07:24 PM   #18
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Well now, does anyone know if this Dawn races, and if this person does, what packs are being used...

ROAR
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Old 10-03-2009, 07:40 PM   #19
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no need to bash roar. it would be nice if they let us know what companies give actual numbers or how to test them.


hey rctvlive gives fair views on things. it would be a good idea to contact them and have them get some specs or do some testing. it would be easier for roar to just make it public
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Old 10-03-2009, 07:43 PM   #20
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that will be SMC always bashing every other comapny" Orion or thunder power" but when those 4200 cells dead on arrival or swelling lipo you NEVER hear from Danny
Danny was quick to replace every cell that had a problem that I have heard of. And if you go to the SMC thread, he mentions the swelling lipo's more then once.
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Old 10-03-2009, 07:59 PM   #21
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Yes. We keep records as to C rating adverstised on the label and what is actually found in the evaluations... although, since we have no rules for and no method to monitor and no right to enforce what people put on labels, we keep that information to ourselves.

I am very aware of which packs are true or truest to their labels.
You could enforce what people put on their labels by not approving packs if they don't meet the C rating they specify. Why not atleast make it public? That would then shame them into fixing the problem anyway.
After having a 'roar approved' pack start expanding after discharging at about 1/5th the C rating I couldn't be bothered with roar approved anymore, just 1 pack for sanctioned racing.
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Old 10-03-2009, 11:13 PM   #22
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from the roar web site, just in case anyone forgot, you know, maybe someone not in the US OR CANADA sorry just messing


What is ROAR?


ROAR is the official U.S./Canadian sanctioning body for R/C car and truck competition.
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Old 10-03-2009, 11:46 PM   #23
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from the roar web site, just in case anyone forgot, you know, maybe someone not in the US OR CANADA sorry just messing
Yeah unfortunately the Aussie sanctioning body requires batteries to be roar approved.. Itīs stupid that they care what the battery rules are on the other side of the world.
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Old 10-04-2009, 12:55 AM   #24
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You could enforce what people put on their labels by not approving packs if they don't meet the C rating they specify. Why not atleast make it public? That would then shame them into fixing the problem anyway.
After having a 'roar approved' pack start expanding after discharging at about 1/5th the C rating I couldn't be bothered with roar approved anymore, just 1 pack for sanctioned racing.
Nice idea, but can you imagine what would happen in the USA, where people use the court to get their own way, if ROAR did not approve a LiPo because it was 38C on a label that said 40C, and it was 60% of the price of the others? It's a nice idea, but it isn't possible for an amateur, voluntary organisation to lay itself open to charges of 'restraint of trade'.

As for your bad LiPo, that has nothing to do with ROAR approval. ROAR Rules are about size, materials used, and the case. It has nothing to do with the quality of the materials, the manufacturing or the user. You should take that up with your supplier. Do not print rubbish about ROAR, who had nothing to do with your failure. They work hard for the racer, and do not deserve your ignorant comments. I hope you will feel able to retract what you said.
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Old 10-04-2009, 03:38 AM   #25
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Isn't ROAR approval 'restraint of trade' already?

Anyway if they atleast made their findings on actual C-ratings public people can make their own decisions on whether to get the cheaper one with a less than quoted C-rating, which may infact be less over quoted than a more expensive battery.
Shouldn't it be as much of a safety issue as hard cases, since a pack discharged at more than the C-rating could explode?
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Old 10-04-2009, 04:14 AM   #26
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Come on you guys its a marketing issue. Think about do you think a company is going to print a different lable for each pack they produce? Yes its sensable but not plausable. If they were to print a lable for each pack it would raise their cost of production and for them to discount every pack that didn't test to lets say test 40c they would have to raise the price of the pack that actually tested at a 40c. So would you rather pay 180.00 bucks for a pack that that tested 40c or 130.00 for a pack that you hope is a 40c? This is where customer service of the manufacture comes in. Hope that there is good customer service for the consumers sake. If you have a issue with a product contact them and I am sure something can be worked out. This is not a ROAR issue. All they do is approve the batteries we use to race to make sure that they are safe and no real advantage over the other competition. my 2 cents.
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Old 10-04-2009, 05:27 AM   #27
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Originally Posted by Bugle View Post
Isn't ROAR approval 'restraint of trade' already?

Anyway if they atleast made their findings on actual C-ratings public people can make their own decisions on whether to get the cheaper one with a less than quoted C-rating, which may infact be less over quoted than a more expensive battery.
Shouldn't it be as much of a safety issue as hard cases, since a pack discharged at more than the C-rating could explode?
Unless you run modified you will never get anywhere near the rated limit of any roar approved pack. of course you could do something stupid with a discharger but that would come under user error wouldn't it.
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Old 10-04-2009, 05:55 AM   #28
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is ROAR the only ones allowed to test batteries? Why doesn't someone else test them?
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Old 10-04-2009, 06:39 AM   #29
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http://www.rctech.net/forum/electric...shoot-out.html
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Old 10-04-2009, 02:22 PM   #30
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Ignor the C ratings, I don't care for them... just buy from a reputable manufacturer and be done with it, chances are your $10.00 ebay lipo is not 70.

I think people are missing the point as well, how many manufactures of lipo cells are there, to my knowledge there is only a few... most of the lipo companies just buy the packs, wack a sticker on it and sell them, or they buy the lipos and construct them.
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