60C really?

dezfan,

My whole point is that the constant C rate does not mean anything. Some manufacturers test loose cells in a pack and then rate the pack based on the loose cells. Some test with 5 awg wire that is an inch long soldered directly to the tabs of the cells. Some consider it a constant rating if it lasts more than 10 seconds at over 3V. Some allow temps of 160 degrees. Some use cooling over the cells. Some test the cells starting at 50 degrees. THERE IS NO STANDARD.

Brian,

You can tell us your opinion of what the standard should be, but no matter how much influence you think you have, all the manufacturers are not going to "conform" to your standards.

You stating what you think the standard should be will not make it the standard. Thinking that your standards are the "standard" is crazy.

I have struggled with this whole C rating thing ever since the beginning when I would get a 20C cell from 2 different manufacturers and the performance would be completely different from one to the other.

That is the reason that we are changing it. At least this way I can feel like we can honestly back up our claims based on anyones "standards".

As an example, I have talked with a customer who thought that the standard should be "Constant C rate should keep the pack under 100 degrees, over 3.5V and should deliver the full rated capacity". I can not argue the point since there is no standard.

All we can do is tell you what the rating is, how we got to the rating, and how to determine what motor to use the battery with. If you smoke our pack on a motor that has a surge watt rating lower than our packs surge watt rating, we will replace the pack under warranty. It is that simple.

-Austin

Originally Posted by austinelse

dezfan,

My whole point is that the constant C rate does not mean anything. Some manufacturers test loose cells in a pack and then rate the pack based on the loose cells. Some test with 5 awg wire that is an inch long soldered directly to the tabs of the cells. Some consider it a constant rating if it lasts more than 10 seconds at over 3V. Some allow temps of 160 degrees. Some use cooling over the cells. Some test the cells starting at 50 degrees. THERE IS NO STANDARD.



-Austin

Understandable, but again it doesn't address your marketing which states:

"As you racers know, the most important factor for your batteries is voltage under load. This LiPo pack boasts a 60C rating for all your amp hungry racing setups. It will maintain higher voltage under load than any other LiPo battery pack on the market."

If the C rating doesn't mean anything, why the emphasis on the 60C rating in your marketing?

I am far from an expert on this matter, but isn't this contradictory?

BTW, thank you for the civil manner you use to discuss this topic. It is a pleasant change after dealing w/ other representatives from MA.

suicideneil,

Why do you always show up around the time that anyone else online starts to busts my chops?

From past history, I know that you LOVE to bash on MaxAmps at every opportunity. I personally don't have the time or energy get into it with you again, and again, ...and again. You don't like us. Thats ok. You don't have to be so abusive:). You are kinda like the bully on the bus who is always flicking my ears just to get a rise out of me.

dezfan,

I am not sure what is confusing. We are changing from using C rate over to using surge watts because C rate means nothing.

Electric Dave,

THANK YOU!!! Sometimes on these forums, the only people willing to state their opinions are the bashers. I appreciate it.

-Austin

I have to head home for the evening. I will not be able to respond again to this thread till tomorrow at the earliest. Thanks for all of your input and lively discussion.

I really do appreciate it, even if it is sometimes hard to take the criticism along with the input. We stay on the cutting edge by always improving and we don't know how to improve if all the feedback we get is good.

Best Regards,

Austin Else
CEO MaxAmps.com

[BrianG]

Originally Posted by austinelse

Brian,

You can tell us your opinion of what the standard should be, but no matter how much influence you think you have, all the manufacturers are not going to "conform" to your standards.

You stating what you think the standard should be will not make it the standard. Thinking that your standards are the "standard" is crazy...

I am not conceited enough to believe I have any influence. It doesn't matter what I think the standard should be, as long as there IS a standard. My post didn't say "this is what it should be", it said "it should be some along the lines of...". Someone made standards in other industries (car audio amp ratings are a good example), so it is possible. My whole point was to develop something quantifyable and consistent. The actual values of v drop, temperature, etc is up to you.

[lutach]

Originally Posted by BrianG

I am not conceited enough to believe I have any influence. It doesn't matter what I think the standard should be, as long as there IS a standard. My post didn't say "this is what it should be", it said "it should be some along the lines of...". Someone made standards in other industries (car audio amp ratings are a good example), so it is possible. My whole point was to develop something quantifyable and consistent. The actual values of v drop, temperature, etc is up to you.

Brian,

There should be a standard and one will come if some poor kid gets hurt because he tried to get 200A+ out of his battery. Who knows, the poor kid might be trying to get his KO Propo to put out 780A. Maybe that guy from California will start a law suit against all this false statements and then we will see some earth like ratings instead of this Alien technology we see coming out. We will then know who to blame for making our Hobby so dangerous with crazy claims. I will back them up by saying, there are still a lot of dumb, uneducated, common senseless people out there who will fall for this and one will only profit from it.