I am wrong about MaxAmps.

Sorry for the small graphs...

There are larger versions here

http://www.nitrokillers.com/forumdisplay.php?f=117

John-I am not seeing the 12ah that you are referring to.

The tabs that we use are copper, not nickel. Copper is 10X more conductive and our copper tabs are very thick. Twice as thick as most the manufacturers I have seen. They can handle those very high amp draws in bursts. I think I have an eagle tree showing bursts in the 250 amp range. I will see what I can dig up. Very few setups are running in this range.

At 20C average, a pack will last 3 minutes. Most guys will set up for a longer run time than that unless they are drag racing or doing speed runs on boats.

With the expanded CBA we were able to do burst at 120 amps. I will try and dig them out or get them tested again.

I do agree that high voltage is a sweet way to go if it will fit.

-Austin

[johnrobholmes]

Can't see them, I have been IP banned from your site unfortunately.

Did you collect any temp data?

Oh yes. There is that little issue:)

The temps were all between 85-90 degrees at the end of the discharge. Keep in mind that this is without shrink wrap on the cells so the temps would be higher in a pack format but no where near the 140 degree max.

I will try and get the high def versions of these posted here also so you don't have to squint.

I will also see about taking care of your banned IP issue:)

[Serum]

@ austin;

Jason swapped the graphs; he swapped the 4200 with the 3200.

are these graphs provided by the producer are are these own measurements?

And can you share what equipment was used for testing?

[Sammus]

There is a 12Ah there.. the scale down the bottom on both graphs goes to 10x the battery capacity. Instead of 4.2Ah its 42Ah... it even says it on the side that it was measured at 32Ah, or 40Ah... is that a 10p pack or something?

[Serum]

my guess it's just a scale error, i think a bug in the software or such;

The capacity and voltage are setup correctly; I assume the software automatically scales with the variables you can put down in these fields.

[Sammus]

Maybe its a 1s10p pack and thats why the voltage is so good under load :)

I kid I kid...

[Serum]

That's bellow the belt mate! Austin is doing his best to help here!

[Sammus]

Bahaha I'm just a stirrer, I tried to make the sarcasm obvious with the second line :P To Austin or any one else: just kidding, please don't take me seriously :P I was just poking fun at the haters :)

The equipment is a CBA with the upgraded add on. The tabs were bolted directly to it.

-Austin

[hoober]

Is there a reason the cells are (only) rated 20C ? (new cells and graphs question)


Are there any older graphs , even if the cells are the older ones? (old graph , cells question)
Are there any graphs of "packs" , even if they are the older ones. (old graph , cells question)

Where can we view a (old) constant current graph of the hv 5000 cells? and Packs?

Thanks.

Originally Posted by lincpimp

I still firmly believe that there are other lipos out there that can outperform maxmaps proucts at the same price. That is all I care about when I buy a lipo. My opinion there has not changed.

However it is important that Maxamps continues to make a postive improvement on thier products, as so many people rely on them! They are a big company that has a large segment of the land rc lipo market. They have a responsibility to improve electric rc!

I agree 100% with you James! I much rather buy other brand lipos, but a ton of people go into the BL world with the VXL cars, and most of them bought max amps packs to go along... So its getting more people into the BL side of the hobby which is good

[lincpimp]

Originally Posted by BlackedOutREVO

I agree 100% with you James! I much rather buy other brand lipos, but a ton of people go into the BL world with the VXL cars, and most of them bought max amps packs to go along... So its getting more people into the BL side of the hobby which is good

I would say that the maxamps packs would be just fine in the vxl trucks. The are not heavy enough to really strain the packs, especially the 8000 mah model!