Interesting lipo testing article...
 

http://www.rccrawler.com/forum/showthread.php?t=273524

Hands up who can ID the blurred labels...

No big suprise there! Max amps were the worst packs I ever owned. Worked better as fireworks than as a lipo. I little dissapointed in the thunderpower packs but not really suprised the 3s packs I have aren't the greatest and kinda always felt 40c was a bit bold. Would like to see the same style test done on larger cells though. Kinda funny that the elite cells look alot like turnigy cells.....

"Raises Hand"

This just confirms what most of us already know.

I was looking down through the thread for someone to say:

J*&%^ here from M*^&^%$.

"If anyone here wants to give me a call, I'll discuss any issues personally. Oh and BTW, we don't warranty packs that have been taken apart. But we will sell you another one!"

:rofl:

Good post
 

GOOD POST, GOOD READ, AND GOOD REVEAL. I not only read through it and found it very interesting and revealing, but I copied the info and sent it to brand P. I found that identifying brand P to be quite easy myself. Who knows what kind of response I may receive, but I thought it would be interesting to see how they reply. I sent it with a respectful inquisitive note asking them for their comments. I do not lean one way or another personally, but getting info from the horses mouth is always interesting. I purchased Lipos from brand P when they first started selling them, and have not purchased any since. I personally find it sad when any company posts up claims on their products not only without any kind of backing, but just has to know that the product is sub par to what it is being advertised. I believe the comparison in this post most revealing, and seems to be on the up & up. Thank you for sharing it with us.

The thing that made me smile, sort of, was when the guy said his dealings with brand P had been less than pleasant, or words to that effect. Having an attitude with other company reps/ owners because you dont like them posting the truth or being honest about the quality of lipos they've used and tested is just not on really- that good old arrogance and ignorance we've come to know & love from brand P over the years. Whats even funnier is that brand P reps have applied pressure on the mods of the traxxas forum to try and shut me up- found that out a little while back; brand P doesnt take too kindly to criticism, yet does nothing to help itself by refusing to deal with people's questions or concerns surrounding their products. Ugh...

Just on a side note saw a post on the traxxas forum from brand p saying they will be selling the fma 1000w charger, and a 47amp power supply... They want like 150 bucks for the power supply...... Wonder where they are getting the ideas from..

Good read, wish a consumer with the resources would perform a larger scale test using most of the popular brands.

I guess I will come out and say it, scratch that last bit I said. I wish someone would test a Zippy pack against a MaxAmps pack.

Then the world will know!

Thanks for posting Neil, it was a very interesting read even tho the outcome wasn't exactly news.

I have a very poor attitude about brand "P" and dont wish to get in trouble so I'm just gonna laugh quietly to myself.

Hmm. I wonder if that 47A power supply is a certain 12v model? And if so, I wonder if they will tell their customers that they won't be able to get the full 1000w potential from that charger unless the voltage is around 24v?

Read
 

If you read through the entire report all were tested as single cells at 20C in order to keep things fair, and equal in nature. He states that testing single cells gives a more accurate reference for comparison purposes. His further testing of their cells were done later at 35C to show how well the Elite cells hold up to its rating.

Yeah I skimmed past that, that's why I deleted my post.

iirc it was a 24v model, already stacked in series. but still prices are typical ma:lol:

i want to see the smaller hyperion cells tested agianist his.

Good link. Except my wife wondered what I was doing when she noticed Chris the Battery Man's avatar.

:lol:

I don't know how the Competition Electronics Turbo 35 GFX LIPO READY works but why didn't they test each cells of each brand at their claimed C rating also? I understand that they wanted the test to be equal for each brand to be able to compare their performance but I would have liked to also see tests showing how one 35C cell performs under a 35C load. And how a 45C cell performs under a 45C load and so on...

Here's a quote:
''It is our opinion that when giving a lipo a C rating it must maintain a minimum usable voltage to qualify for that rating. (i.e.: if someone calls a pack a 35C pack then it should, at 35c, have at least a 3.4-3.6v average discharge voltage for each cell in the pack)''

After saying that, I would like to see a graph of one of their 35C rated cell with a 35C load on it. They say that they will start to include graphs of their cells again so I applaude that. I would have liked to see that graph right now during these tests they made.

I wish he would post some discharge graphs - All I saw were pictures of a brass band

LOL Neil you knew everyone here knew brand P was sh!z, so thanks for sharing the brass band. It was mesmerizing :eyes:

You're welcome. :wink:

Im just waiting for brand P's reps to chime in here and call us bullies and haters again- or perhaps we could discuss it in private... :no:

Have they really come in here and said that?

Wait, you guys were reading something? I was slightly distracted as well...:lol:

Yes. Yes they have. Sad isn't it?

MIstercrash- he posts the house brand 35c discharges in there too.

He did but what I see is the Elite 850mah 25C was tested @ 17 amps, the Elite 1000mah 35C was tested @ 20 amps and the Elite 1300mah 35C was tested @ 26 amps. It's all close to their claimed max C rating but not quite. I would like to see tests done on those same cells @ 21 amps for the 850 cell, 35 amps for the 1000 cell and 45 amps for the 1300 cell. Maybe they're not afraid of doing that but it's just that the equipment they use can't put higher loads on the cells? Anyway, I'm just being finicky I guess, I love that they went through the trouble of doing these tests and share the results. And I am impressed with the performance of the Elite cells. I'm hoping they do more tests on other cells like they mentionned.

As has been discussed ad nauseum here & in previous threads. It would be great to see a benchmark discharge test & graph for all common cells as well as tests at respective claimed discharge ratings. Very few manufacturers would be keen to assist/supply for that style of testing

Brian have you given your testing rig any more thought or did the components fall victim to the flood?

Please post up the response when/if they even bother to send you one lol. I am betting on them never replying to you at all, they dont have the balls. But if by chance they do I am betting on it sounding like a politician answering a question.......you know the kind where they just turn the question around and rephrase it so it sounds like an answer but it really isnt. lol

I think if a pack has X c rating it should hold that at the given voltage of 3.7 volts per cell for at least 30 seconds.

It's funny how some make this out to be harder than it is to have a simple and understandable standard.

Just as an example of what I mean.

If I have a 14.8 volt 5000 mah pack rated at 25c then I believe it should hold 14.8 volts at 125 amps for 30 seconds while also keeping a safe temperature. It's plain and simple.

I agree. Hold nominal voltage at rated current for some standardized amount of time. Perfect. :yes:

Funny.
 

Its actually funny even talking about this as if they don't already know what their cells are, or are not capable of. If we the consumers have already figured out how they should be rated, then you can bet that they the professionals have already considered and probably done this type of testing on their cells, but of course refuse to show them obviously because it would more than likely ruin their overall sales. No one who invests a fair amount of capital into a product wants to share any unfavorable news about that product, before they can get them off the shelves. Its not like these guys at brand "P" are not into this hobby, and have not used their cells extensively. I have to believe that they have used their own products in various situations, and compared them to others out of pure curiosity. But someone at brand "P" is obviously a great advertizing professional and realizes that if you wrap up a pile of dog crap with the right package a ton of people will buy it thinking that they are getting a good deal.

I would really like to see a test of some Turnigy and Zippy cells

+1 all the turnigy packs i use for racing have worked as well if not better than the more expensive pack i had in the past. sounds as if someone here could do well to test lipos independantly and post TRUE results for a small fee to these companies as a confirmation of quality.... ahem Mr. G:lol:

I just got an email from maxamp stating that they now have 150c lipos :lol:
http://www.maxamps.com/Lipo-6500HC-74-Pack.htm

Holeeee CRAP

Did anyone else get MA's latest newsletter (which I have tried to unsubscribe from no less than 10 times) ?

150C

Yes, you read that right!

Haha synco posto ^

Well what do you think Josh?

Strange they're not using 4G wire eh?

I think they are probably overrated like all their other stuff. Im guessing around 50c max TRUE c rating.

yeah something that powerfull should be using battery cables like a 1:1 car!

I just started a thread on them... :lol:

Challenge.
 

Yea someone has to make an open challenge to them on this one. Sounds pretty rediculous to me. How in the world can they stand by a claim like this one and expect not to have to show some proff of it? How many amps is that on let say a 5s battery discharging at 150c? Sounds impossible to me using standard Lipo wiring.