Maxamps has discovered 2P packs (New Product, DUAL CORE!!!!)
 

Got an email today showing off maxamps' brand new innovation! Taking something that's been around for a long time, and giving it a fancy name.

They call them, "Dual Core Lipos". (AKA 2S2P, etc...)

2p packs cause many many of their earlier problems. The cells dont stay perfectly balanced and create problems.


Way to rename and attack the uneducated....

Brandon posted them here already and I removed it. Tired of them peddling their crap here. All it does is create post after post of flaming and nothing good ever comes of it. I have no idea why they would even think of advertising their products here given the overall forum bias, but I guess negative publicity is good publicity.

more tabs which equal more solder joints offer the least resistance? They have moved from inflated claims to flat out lying to the public.

UNSCRUPULOUS. NO SCRUPLES AT ALL.:diablo:

I got that email too, got a pretty good chuckle out of it!

@BrianG: instead of deleting brandons posts you should just make it so he can't post at all. He might get the hint then.

Leave maxamps alone! They have great products, and awesome quality service to go with it! I have used their products and they are nothing but innovative and cutting edge....

Or was it RC-monster I am thinking of? Help me out here?

OMG...:lol:

That would be Mike's call. I can imagine Mike wants to keep his login so that he can answer questions should they arise, but I do know from talking to him that he does not want gratuitous advertising.

I was not informed of this. I apologize. I will stay active here to answer any questions if they arise.

Thanks,

Brandon

That would be great if you actually answered the questions that we asked. Heck we are still waiting for answers to questions we asked you almost 2 years ago. Oh and did you finally get those graphs for us? Oh of course not. Keep on trollin.

It depends which way you look at it. Or it depends to what you are comparing. Here's how it CAN be true.

If the 1 8000 cell had the same size tabs as the 1 4000 cell then of course the tab would be getting half the load. It is my experience that the cell tabs are one of the first bottlenecks when cells are of great quality and loads are above 40C. This probably doesn't start to show up until around 30-50 C and these particular (true 150C) cells are going to overheat LONG before the cell tabs are of concern.

Here's how it could be NOT true.

If the 1 8000 cell had appropriate sized tabs (double area or circumference) then 1 8000 cell with 1 tab would be the best choice.

Here's how it is unimportant and meaningless well thought out marketing.

50+mph in most brushless setups(7.4 volts)
48 minutes average run time (1.25C average discharge)
5C fast charge capable (1p or 2p makes no difference at 5C rates)
With any 12awg wire
With any std connectors

So, when comparing to a 4000 pack of course this is a good thing , but so is a single 8000 pack. When compared to a pair of 4000 packs it isn't much better. When compared to a 8000 pack it is still no better.

You must be assuming that these cells can come anywhere near 50C while still holding something resembling a decent voltage...

Uh, no. Just the opposite. I predict these will overheat long before 40C. I guess another way to say it would be that the cell itself is going to overheat before the single/double tab difference kicks in (if there's any difference at all)

2 small single tabs or 1 bigger tab= no difference to me (or at least a very insignificant and unimportant difference)


The real question is instead of all the hype about 2p packs why not just state how much current one of these packs can do while delivering about 50-80% of capacity? That's what really matters. OR state the cell ESR OR produce a graph of around 200-500 amps.

I think their claim of less resistance is true. Think of it in a car audio point of view..... 2 4ohm speakrs run in parallel is 2ohms. So in theory if 2 cells are run in parallel the total resistence of the cells and the solder tabs/joints should be cut in half.

I could only see the pack having slightly more surface area to dissipate heat, and even this I am not sure of.

The only discharge test I have seen coming close to its max continuous rating was Everydayflyer on RCGroups testing the 3s 45C 2200mah Hyperion pack, at 42C continuous discharge the voltage is well acceptable, plus the pack temp is at a still safe ~140F.

Everydayflyer has NEVER tested a Maxamps pack (from the list I saw), and probably never will as maxamps KNOWS that it will simply not return a remotely acceptable discharge graph, let alone for it's ratings.

Good to see these guys know Brandon and MA in general is all hype and B.S.
http://www.rccrawler.com/forum/elect...ml#post3803976

I'll be happy to test one of their packs out.....in my onroad car that does 60+. That car abuses batteries as the constant braking/full throttle are torture on all electronics. Of course when it puffs, we can all have a good laugh

Can anyone educate me on the '200a' setup they have?

I've been toying with the idea of getting 20-30 high watt resistors to have fun with:whistle:

I've got a bunch (160) of 50w 3ohm resistors lying around available for sale if interested. There were going to be used for a battery-testing rig, but never got around to it. They are 50w each, but do need to be heatsunk/fanned for them to truly dissipate 50w (by themselves, they'd be good around 10w). Here is a pic of the resistors (and a CRT.5 for scale):

http://scriptasylum.com/forumpics/resistors_3r0.jpg

PM me if interested...

Yes, I can see how Maxmumps just discovered 2p, they were looking thru the return bin (thats right, MA used to accept returns way back when they 1st came out, I even managed to swap out defective batteries for "good ones") and came across one of their old 6000 packs (3000 cells in 2p config) and figured they could bring that back with a twist!!!

I really have to give it to these guys, no end to their marketing!

I remember well how the 2p packs performed. One cell would do all of the work, and the other would just slowly die. Once you tried to push the pack, the "good" cell puffed.

I bet I pulled apart 100 of MA's 2p packs and made 1p packs out of the useable cells. The 4000 cells were not bad, you could run a crawler or something brushed with them. They were solid 10c cells. The 3000 cells could barely power a cell phone.

Oldie but a goodie


http://i88.photobucket.com/albums/k1...zzzTy64803.jpg

What is this Bondo? Zippy workshop?

Its a actual picture of MA HQ back in the garage days, a forum member here (forgot who?)did the "art work" and posted it years ago.

If you look under the P's in Zippy on the wall you'll see rolls of MA pack decals.

Ahhh, yes, the elusive Holy Grail of the lipo world; those flame stickers are worth more than gold since they at least triple the performance of anything they are affixed to.

scratches head and sees opportunity to sell zippys as fake ma's via e-bay...

I think you're onto something there. you can get Zippys at less than $20 for a 2s 5000 mah. Test it to make sure both cells are good. Then find some nice flame stickers and put a MaxCramps label on it. Guaranteed to be able to charge $50 a lipo for them!!

Who you kidding ?
The MA decals raise retail automactically to at least $100.00 !?

Well I was trying to give a bargain while still giving the super flames power!


I just realized that MA took the approach of Coors Light. Blue flames on the stickers means packs are cold just like the blue mountains on the bottle. However, Coors bottles don't remotely puff, catch fire, or provide disappointment...

Coors doesn't claim that their alcohol content is 600 proof either....

Its still the garage days, nothing has changed

Kind of like putting a fart cannon on a civic, instant 300 horsepower.

Or a NOS sticker...

I am sure we can find some cheaper batts than zippies to put the stickers on. Would hate to improve MA's rep with out unlicensed product...

Makes you wonder just how cheap the cells are that MA buys. They must be cheaper than anything you can get from Uh or Hobbypartz...