MaxAmps Race Edition Lipos

[Bondonutz]

RAOFLMAO, Good job !

[JERRY2KONE]

I have to agree with this one. The MaxAmps pack is surely the best looking Lipo in the bunch, which has to mean that they are the very best for our money. We should all rush right out and get a few packs, right?

[josh9mille]

Yeah its funny that the Hype is so plain looking but is probably the best out of the 4. And then there is the MA pack........ Ill just leave it at that.

[suicideneil]

So, thats^ alright, but an honest comparison of packs, specs & prices isnt? Explanation required please as to why my post was deleted, not impressed right now... ( still havent seen any evidence to prove the 75/150C rating either on these MA lipos ).

[JERRY2KONE]

Neil you cannot honestly believe that we are going to acquire proof of this can you? I mean really? 150c honestly? I'm not falling for this. Ture 150c rating? Science fiction at best.

[suicideneil]

Originally Posted by JERRY2KONE

Neil you cannot honestly believe that we are going to acquire proof of this can you? I mean really? 150c honestly? I'm not falling for this. Ture 150c rating? Science fiction at best.

Exactly, thats why we all want some proof of the ratings; otherwise it just proves MA are full of poop and rely on gullible/ niave noobs & 12 year olds to keep them in business.

[What's_nitro?]

The number of consecutive "ha" sequences I would like to use to reply to that post would exceed the character limit for replies on this forum.

[hemiblas]

So judging from the graph that was posted at a 50 amps discharge rate are we expecting to see the same battery hold 487.5 amps continuous? Objectively speaking, I really dont think that battery should be tested with any higher amperage being drawn from it given the voltages that were shown. We all agree 50 amps is a lot. So we are saying an 10C continuous pack with bursts of 20C is more than sufficient for most applications at a 6500mah rating. Yet I see ratings of 25C, 40C and now 75C continous being advertised. I understand the need to post these higher numbers as I'm sure they generate sales, but eventually these numbers come back to haunt manufacturers in the forum posts.

Brandon,
You have a great attitude, and if you keep it up I believe you can the company you now work for some good. Any manufacturer that openly argues with potential buyers in these forums just does more damage than good. This is a tough industry to be in. I dont think I have ever tested a battery that has lived up to its claims in terms of advertised C rating vs real world numbers.

[What's_nitro?]

It basically comes down to one thing: The IR (internal resistance) of the cells.

A lower IR allows the cell to output more current, with less voltage drop. Period. No way to argue with Ohm's law. A cell with a higher C rating should have a lower IR than a lower C rated cell.

If there could ever be a standard rating for cells that would be it. IR @ 70*F.

If anyone sees a flaw in that plan let me know, because I don't see it right now.

Edit: For example, in order for a 975A current to even be possible with ANY cell, their IR can be no greater than 3.8 milli-ohms (0.0038 ohms). This is at the nominal 3.7 volts.

[BrianG]

The only flaw I can see is that IR is not linear with current draw. It's pretty linear until a certain point (where the chemistry simply cannot flow more electrons), then IR ramps up heavily.

[What's_nitro?]

True, but if this rating system were actually adopted, you would see MFGs rating their cells at the point immediately before the IR started to increase- since that would be the maximum performance of the cell.

[moneybagsfor-rc]

I am a serious buyer, if these batteries can in fact do a legitimate 75c continuous graph, these WILL be my next buy. What's the hold up?

All joking aside, I am disappointed in the lack of proof, as I would assume that a company would perform tests on a product they claim to have certain specifications. If MaxAmps had done this, they would have graphs before release (as they should have) and there would be no problem showing us them, but unfortunately I do not believe that is the case.
If an airplane manufacturer claimed that their airplane could hold 5 people's weight you better believe they'd have done tests to support that claim prior to releasing their product. It's just basic business principles.
I commend you for your efforts and the way you are handling yourself on these forums, Brandon, and wish you the best of luck, but unfortunately I think that Maxamps has a bad reputation with a lot of members on these boards and you might have a tough time convincing them otherwise.

[slimthelineman]

McP is right. This is how I have felt about ma for a long time. Big claims with didly to back it up. To say 75c continuous and 150c "tru" ...... Burst would mean testing was done. But not for max amps they just pick a random number I feel like. I seriously doubt any lipo cell of this size will sustain a 475 amp draw for any length of time. Not that that is what we need but don't advetise it if it ain't true. In most states that is false advertising. I mean really the dude has had 14 pages and a couple weeks to quell the critics and what have we seen? Same old products and claims from the same old company. Not to mention the demographic of uneducated hobbyists they target I'm waiting for someone to be injured cause they overated their packs with no actual testing or proof. Some will say I'm being harsh but who cares put up or shut up that's how I roll if you say it's 75-150c let's see it you've had plenty of time to show us how you came up with this rating. Let's just hope it's something more than a bold faced lie.

[JERRY2KONE]

Well honestly I expected that we would be waiting and waiting and waiting on them to come up with some sort of info backing up the claims, but what I would like to hear about is how the cells worked out for MonsterMike since he was given some packs to play with. So MM whats the scoop? How did those LiPo packs hold up for you after Brandon gave them to you? He told us that he gave you some race packs to try out, so what is your take on them?