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Old 07-21-2010, 10:56 PM
  #61  
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I'm pretty sure more than 3 companies make lithium cells for lipo. Perhaps a couple of hundred or so. Some companies in China probably hire people off the street to assemble them, specialists assemble them, etc.

Another variant may be that companies such as Flightmax, etc, the cheap brands on HK, may not be getting the best quality lithium cells/or the best assembled ones.

The R/C industry isn't the only one that uses lithium batteries. More and more companies are coming to the table I'm guessing.

But a good lipo pack all depends on good lithium tech and good assembly. I'm guessing the cheaper brands don't really focus on this, but it's sort of hard to screw up an entire batch. This is probably why some of them are busted, bad assembly or a bad lithium batch from the get go. Who knows.

I could be wrong, though..
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Old 07-21-2010, 11:21 PM
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Originally Posted by Briguy View Post
Well , I hear their warranty isn`t that good , but what do you expect for a $20 lipo . You can but 4 of their lipos and 2 be shot and still cheaper then the name brands .
Exactly man, your still way ahead
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Old 07-22-2010, 12:47 AM
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Originally Posted by SaladFork View Post
Man I see some scrubs at the track, some guys look like that have never showered and they wear the same thing every time. However they have nice R/C stuff, but cheap clothing and a POS real car. I would much rather spend a few bucks saving on a battery for practice and bashing. And the coin I save use to buy the higher quality packs for racing and some clean clothes, a tooth brush and water for a shower.
The problem with that statement is the assumption that because a pack is more expensive, or from a LHS, it is inherently "higher quality".

I have 9 (nine) 5200 2S 30C hardcase lipo batteries and over 10 airplane/helicopter lipos of various size and cell count. They are all Turnigy batteries from hobbyking.com. Not only have they all worked, but had within 5% of the advertised capacity. I can't speak to the hardcase life because they are new for this season, but I have not had any issues with my plane batteries, and their capacity droop has been very good (~10% a year). Is this high quality? If it isn't, what makes a battery high quality?

That being said, I am at a 10% failure rate on ESC's and 20% on motors from them, but they are so cheap I usually order 2 of everything....

It is a personal decision though. I race with plenty of people that would rather pay 2 or 3 times as much for a battery from a local place. It puts a small percentage of the cost into the local economy and it gives you a point of contact for failures. I would rather spend the same money and have multiples for spares, but I could see my method switching when I have a bigger hobby budget.

About Manufacturers -


A lot of people default to the "All this cheap junk is made in China, buy from a local hobby shop!" In reality though, LiPo batteries are chiefly made in Japan and South Korea. I don't know if that makes a difference to anyone though. There are a TON of manufacturers all around the world (see links), but like with anything there are a handful of big ones (Samsung SDI, Shenzhen BYD, BAK, and Tianjin Lishen). There are even a number of manufactures of Lithium batteries in the US, but the primarily make low run, large, high quality, pure chemistry batteries for backups, large power banks, and vehicles.

I have done a lot of research and to my knowledge there are no hobby battery cells made in the US. I have found a few that are assembled here, but with foreign made cells. Please set me straight if I am wrong.

http://www.batteryuniversity.com/parttwo-34.htm
http://energy.sourceguides.com/busin.../byC/byC.shtml
http://gm-volt.com/forum/showthread.php?t=2093
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Old 07-22-2010, 01:35 AM
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Originally Posted by Jakesterama View Post
The problem with that statement is the assumption that because a pack is more expensive, or from a LHS, it is inherently "higher quality".

I have 9 (nine) 5200 2S 30C hardcase lipo batteries and over 10 airplane/helicopter lipos of various size and cell count. They are all Turnigy batteries from hobbyking.com. Not only have they all worked, but had within 5% of the advertised capacity. I can't speak to the hardcase life because they are new for this season, but I have not had any issues with my plane batteries, and their capacity droop has been very good (~10% a year). Is this high quality? If it isn't, what makes a battery high quality?

That being said, I am at a 10% failure rate on ESC's and 20% on motors from them, but they are so cheap I usually order 2 of everything....

It is a personal decision though. I race with plenty of people that would rather pay 2 or 3 times as much for a battery from a local place. It puts a small percentage of the cost into the local economy and it gives you a point of contact for failures. I would rather spend the same money and have multiples for spares, but I could see my method switching when I have a bigger hobby budget.
+1
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Old 07-22-2010, 01:49 AM
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hobbyking send a cracked and expanded turnigy lipo to my friend.
its 5000mah 30c, hk knows it will cost more than the battery to ship it back.
we will not buy lipo from hk again
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Old 07-24-2010, 11:57 AM
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I like reading these type of thread people take things so serious buy what you want run what you want who cares what Tom/Dick/Harry is running.I'm no Adam Drake therefore buying a 200 4s Lipo compared to a 65 HK 40C makes sense in my book. Off road has some many variables if I was running off road then maybe a better quality Lipo could be an advantage or even drag if we talking about longevity my three HK lipos for the cost of a 200 lipo will last longer

GO HK
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Old 08-10-2010, 12:21 PM
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Default Have you had a delivery problem with Swiss Post?

Folks:
After reading this thread, I decided to take a flyer and order lipos from Hobby King. Swiss Post seems to be a delivery service. The tracking information is sparse compared to say UPS. But the last notice is that "delivery failed" yesterday. E-mails to Swiss Post have been returned as not their problem.

Any idea if whomever delivers in Arizona for them, will try to deliver again? I use my office for delivery site since we are open 8-5 weekedays.

Thanks
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Old 08-10-2010, 12:33 PM
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Originally Posted by Owen RaCing View Post
To me it is funny that you would spend $1000.00 on kit, parts, accessories, tires, radio, and then buy a cheap HK lipo. To me that is disgraceful. In this current economy, you should spend your money wisely on good product. Ive had to many issues come threw the hobby shop with cheap batteries. And who at turnegy (SP?) decided that it was a good idea to use 10 gauge wire on 2 cell lipos? So difficult to solder, its ridiculous. And most people want Deans on them or traxxas connectors.

Funny thread, funny thread.
Given all the positive feedback about HK on this thread, I'd say they DID spend their money wisely.
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Old 08-10-2010, 12:36 PM
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Originally Posted by Ed237 View Post
Great point about the connectors. I wish you never brought that up. Now I'm really bumming about how it took all of my fee time and money to solder up those Deans connectors.

Oh well, At least I still have that $200. Maybe I'll Tower-up a T4.1 just for the hell of it to console myself with.
I just solder the 4mm cnnectors on my ESC. I have fewer ESC than I do battery packs, and since I plan on buying all my batteries from HK, I find it easier to conform to their standard.
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Old 08-10-2010, 12:39 PM
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Originally Posted by speedin View Post
I am not doubting you...I am curious...Who knows the name of the three manufacturers of lipo cells in china and or korea?

Secondly, If all lipos come from three different companies in china or korea....then companies like max amps, smc...ect, are up charging that much??? If the actual cells, are the same in an smc pack vs a pack from hobby king, then why is smc, max amps soo much more?? Are they really making that much a profit. If it is like you say, then smc, or max amps gets their batteries from china, assembles them here in the u.s.a, then re sells them for a huge profit? I know one of the issues with hobby kings packs, are not the cells usually, its mostly the defects in assembling the packs that causes the faliures.
Something doesn't sound right with that...but maybe i am wrong.
Years ago, when I worked in a grocery store, I discovered that the generic, store-specific brand of pasta came off the same line as the Prince brand of pasta. Just a different box and, of course, a lower price.
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Old 08-10-2010, 12:42 PM
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Originally Posted by Sal Bandini View Post
Years ago, when I worked in a grocery store, I discovered that the generic, store-specific brand of pasta came off the same line as the Prince brand of pasta. Just a different box and, of course, a lower price.
I think your lesser known batteries are like that too. Just a different wrapper
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Old 08-10-2010, 12:46 PM
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Originally Posted by Drusillus View Post
I think your lesser known batteries are like that too. Just a different wrapper
But not as tasty.
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Old 08-10-2010, 01:44 PM
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I bought 2 4000mah 2s 25-30c packs from hk about 3 months ago

soldered deans up just fine! (had to use a bigger iron though)

and charged them both

one pack charged to 4265mah the other pack charged to 4285 mah.

after the first charge @1/2c i now charge them at 1.5 c..

just last weekend i had a solder joint on my charger break loose (two seasons of charged and connecting batteries and disconnecting them something was bound to give lol)

ended up shorting out one of my cells...

on my eos606i it reads both are dead..

on my buddies 720 i it says cell 1 is dead and cell 2 has 3.8 volts.

will i tear the pack apart and see if i can fix it? maybe is it worth my time and money? nope....


also for people not wanting to pay 100 bucks a pack...

look into the supreme power packs from amain (protek) they are around 40-$70 bucks and are GREAT packs.
as soon as the packs are back in stock ill buy 4 more.
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Old 08-10-2010, 02:02 PM
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Originally Posted by Sal Bandini View Post
Given all the positive feedback about HK on this thread, I'd say they DID spend their money wisely.
But the fact that this thread was started on negative feedback is enough. And to your other post, a good lipo (For example, Thunder Power) are assembled by americans and have a good american customer service. Not the same as HK at all.

If you have to buy 5 batteries in hopes to get a couple good batteries, that is a joke. I don't care how much money you save, thats gambling.

Buy one good battery and use it without worries.
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Old 08-10-2010, 02:43 PM
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Default my error

Martin B. See above. Actually my batteries are just leaving Zurich. Not in the USA> Sorry for the error.
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