60C really?

[rawfuls]

I was thinking about that as well, but I don't think many people would help buy a MA pack, from reading this thread... =/

[Bondonutz]

I'm in for $5.00, If it fails then maybe we can flame freely ?

If this were to happen and the pack passes, I'll buy one to show sportsmanship.

[rawfuls]

I would do the same, minus the buying one, I don't even have a motor yet... =/

I'd be down for tossing in a few bucks as well....

And if it does fail...
Which guy here has that new shotty?

But if it passes, we go grab a frame and frame it?

[lincpimp]

I would throw up some money towards a pack from MA. No need to get anything more than a 2s pack for testing purposes. Plus we must have someone here with that 20% discount that can get us a "deal" on it... I used to have that thru the local hobby shop, and if I called MA it might still be available. LHS addy has changed though, might need to update the info a bit.

[nitrostarter]

I'll throw in a couple dollars as well. And IMO, I think it should be donated to the guy on RC Group to test. Reviewing his work, he seems thorough and non-bias in his testing, so I think he would give the MA pack a fair chance just like the other.
I have said this for myself as well. I wouldn't mind buy a MA pack if the price wasn't double a comparable product.

I just picked up (2) Hyperion G3 Vx 2s 5500mah packs. I paid $76.50 each for a total of $158 shipped for the 2 packs.
I actually looked at the comparable MA packs. 5250HC packs at $134.99 each.....
That in itself justified my purchase, along with the past history.

Now, I'm not trying to bash. My LHS sells the piss out of MA packs. And the only way he buys them is with the 3yr warranty. I have seen quite a few of these racing at the track and asked about them. The say they are great. I asked if he tried any other packs, they say No....

I too would like to see the discharge graphs to substantiate the 60C claims.

[_paralyzed_]

Maxamps Austin: Please take a look at the discharge graphs Everydayflyer has posted in RCGroups. If you were to allow him to test one of your packs using the same methods he used to test previous packs we would have a real world comparison and be able to make an informed decision about the batteries we purchase.

Conversely, you could get some higher end packs such as Thunder Powers or Hyperions and test them yourselves using your methods and show how they compare.

There are ways to back up and substantiate your claims, that is all we ask.

I hope you read this, and RCM Monster Mikes post, as the majority of us don't wish to argue, rather exchange facts. I sincerely hope you can ignore the nay sayers (there will always be some) and rejoin this discussion so we all can learn the truth about these matters.

- _paralyzed_ out

The way I see it, there isn't nobody holding a gun to anyones head to buy Maxamp Batteries, if you don't like them then go by another kind or go buy some of those Hong Kong Zippies. I have been running them for years and will continue to run them. I don't know what the fuss is, they are still the same batteries they were a month ago. I don't think anyone on this forum can tell me what CONSTANT RATING IS or STANDS FOR, because there isn't one RC vehicle in this world that has a CONSTANT AMP RATING????????

[suicideneil]

Originally Posted by Big Bob

The way I see it, there isn't nobody holding a gun to anyones head to buy Maxamp Batteries

Correct, but using so much advertising that it increases the cost of the packs is bad practice. If a noob only sees adverts for one brand, then who are they to know that opther brands are better value or better performing.

, if you don't like them then go by another kind or go buy some of those Hong Kong Zippies

MA lipos are from china, thats the point, they just assemble them in the USA. That doesnt fully explain the massive price hike though.

I have been running them for years and will continue to run them.

What vehicle/driving style/setup/ any eagletree graphes or comparative data with similar spec'd packs from other brands?

I don't know what the fuss is, they are still the same batteries they were a month ago.

Not according to MA, they suddenly have new cells that can perform better than anything on the market, though there is no proof of that claim.

I don't think anyone on this forum can tell me what CONSTANT RATING IS or STANDS FOR, because there isn't one RC vehicle in this world that has a CONSTANT AMP RATING????????

Planes, helis and boats pull pretty constant loads as they are at a constant throttle level for long periods during a run, that is why a C rating is useful.
The issue is that MA says a C rating has no use, yet insist their new method of rating a cell is better than the continuous method use for years, by every other brand out there. A burst rating is equally useless, as no R/C out there pulls a constant burst of current The point of a burst is that it lasts for 1/2 a second or so at most, where as the average current draw (achieved when full thorttle is hit down a straight for example) is the more is more useful to know; hence why a continuous C rating on a lipo pack serves more purpose than the burst rating, but also why its good to have both, as most lipos do.

Anyways, the C rating on a lipo is the level at which the voltage doesnt drop below a certain point at any given discharge rate- I've explained this countless times, with worked examples. The only thing in question is the voltage at whnich the lpo must hold stable for that given current draw, but 3.2v - 3.5v is a safe level- see the other thread that sproutted from this one regarding a petition for standardized ratings.

Are you from the traxxas forum by any chance?...

Mike,

Thanks for you posts. As you know, I have loads of respect for you and anything you are involved with. I really appreciate you jumping in here.

I did NOT start this thread. I am not trying to "sell" anything here. I was just trying to explain the new testing method and rating system that we are currently using since there seemed to be a lack of understanding with regards to why we would use the new system.

Some of you guys agree with it, some don't. You all will buy whatever products you want to buy regardless of what I say.

Donating a pack to someone here will do nothing to help explain our new rating system. We changed our rating system....not our packs. I am not here trying to "prove" anything. I just jumped in on this thread to help explain our rating system and why we use it.

If I was the thread starter and started the thread with "Why don't you all just buy MaxAmps packs because they are the best" then I could see the need for your negative posts. Some of the posts in this thread that have been deleted were way, way over the line. Frankly I get a kick out of some of it because it is very creative:)

If someone here wants to test a pack, we offer a 30 day money back guarantee. Feel free to take advantage of it if you wish and it will not cost you a dime. You might just like it and end up keeping it:)

Best Regards,

Austin Else
CEO MaxAmps.com

[ClodMaxx]

Originally Posted by austinelse

Donating a pack to someone here will do nothing to help explain our new rating system. We changed our rating system....not our packs. I am not here trying to "prove" anything. I just jumped in on this thread to help explain our rating system and why we use it.

i think feathers got ruffled partially by the claim 'It will maintain higher voltage under load than any other LiPo battery pack on the market'. no rating system in the world... effective and accurate or otherwise... makes that true, unless you have something to back it up with. if you do - prove it and post your graphs with comparisons with other top notch brands, and i can guarantee just about everyone here will eat crow and buy a pack from you personally.

that is a false claim... and a misleading one, if you have no proof.

I'd be more than willing to kick in a few dollars to help w/ the purchase of this new pack and have it tested. It would really help to answer the questions we all have in regards to how it stands up to packs w/ known parameters.

If the test goes well, it would go a long way towards repairing the trust factor that (at least for me) is lacking in purchasing MA products.

[Bondonutz]

Originally Posted by FastXR

Wonder if the 30 day money back guarantee will apply to a pay that was "tested" in the way it will be.

Originally Posted by austinelse

If someone here wants to test a pack, we offer a 30 day money back guarantee. Feel free to take advantage of it if you wish and it will not cost you a dime. You might just like it and end up keeping it:)

Best Regards,

Austin Else
CEO MaxAmps.com

I say we donate the test pack to the tester for a honest video recorded test

[suicideneil]

I think thats one of the main issues really:

1) Its easy to claim they are the best packs on the market, to para phrase Austin, but without proof thats an empty claim.
2) Other manufacturers display graphes with discharge info, so why not MA?
3) Ignoring issues with older cells that users have experienced is not fair; if you want examples of why people dont trust MA, then you have to be prepared to listen to people's experiences of older packs (vs other companies older packs).
4) Choosing to completely ignore people's questions or critisms and running away back to the NK forum hardly looks terribly proffesional; stay the course and face upto the questions, and try to dispel the negative comments and preconceptions.
5) Give some insight into the reasoning behind ditching continuous ratings, other than 'burst ratings make more sense', as it really doesnt make any sense given the nature of ground based vehicles. At worst, burst ratings and continuous ratings should be listed, with graphs showing that the lipos can perform to those ratings- unlike the 35c pack that only manages 28c in the graph I posted (from the NK forum no less...).

[Unsullied_Spy]

I'll toss in $5 to buy everydayflyer a new MA lipo I'd truly like to see how they stand up against the competition.

[hoober]

Charles has around 1kw + capacity to test. I only have 500 watts , but am willing to send 400 watts to Charles to add to his. He can add it right in with his two cc-400 units.

I'm very close to pulling the trigger on another 400 watts myself anyways, and there are some others who may have a couple kw capacity. I can also add on a couple hundred amps to my cba graphs manually for graphing over 60C.

This brings up some questions about cell count and current. Why not test a single cell at 60C and a 3S or 3s pack at whatever current Austin says is ok? Whoever has the biggest Maxamps discount take the donations and buy the battery. I will ask Charles if He's willing to do it. I wouldn't hold my breath. If He is not I am willing to test it , generating a normal CBA graphs.

Start adding some numbers 5250 x 30C = 158 amps x 3.5 volts = 550 watts (looks like I will need that other discharger) Is anyone in favor of going higher?