I am wrong about MaxAmps.

[lincpimp]

Originally Posted by Robert

So, I'm in need of my first Lipos for an MM5700. I plan to run it in the new Traxxas Slash.
What do I do for a charger an batts? I was going to get one of the combos from Max amps but I don't want a fire my first time out. I'll subscribe to this thread, hopefully you'll have some insight for me.

Hey Rob, do you want to run 2s or 3s lipo? I would say for 2s lipo a trakpower pack would be good, and for 3s lipo a neuenergy 5000 3s pack would be good. I have both and have had excellent service from both. Neuenergy also make a hard case 2s version of the 5000 pack but they can be hard to find. All of these batteries are available in the rcm store, as well as quite a few chargers.

[Robert]

Originally Posted by lincpimp

Hey Rob, do you want to run 2s or 3s lipo? I would say for 2s lipo a trakpower pack would be good, and for 3s lipo a neuenergy 5000 3s pack would be good. I have both and have had excellent service from both. Neuenergy also make a hard case 2s version of the 5000 pack but they can be hard to find. All of these batteries are available in the rcm store, as well as quite a few chargers.

I'm still learning so be easy on me. I believe 3s Hard case would be nice. A GOOD charge also please. I only want to buy it once.

Link me up if you would.

My last few items on ebay are finishing up in the next few days so I'm just about ready.

[lincpimp]

Originally Posted by Robert

I'm still learning so be easy on me. I believe 3s Hard case would be nice. A GOOD charge also please. I only want to buy it once.

Link me up if you would.

My last few items on ebay are finishing up in the next few days so I'm just about ready.

Here is a good 3s pack: http://www.rc-monster.com/proddetail...eu3s5000car25c

And a good charger: http://www.rc-monster.com/proddetail...charger&cat=19

And this is a good balancer: http://www.rc-monster.com/proddetail...package&cat=19

[johnrobholmes]

I think Jason just doesn't like me.

When I met him at the Midwest Nats I recommended that he use a bigger battery for longevity and amperage overhead. He told me the pack was working fine and that he would continue running it. So, I got one of the guys (call him X) running his pack at the meet to let me strap on my data logger. A 20C cont. rated pack hit 3.1v/cell upon 1/10th sec burst at 17.5C- maybe the pack wasn't warm enough. The sad part was that X's pack was 2.5 times the capacity of Jasons, so I can only imagine how bad his pack was getting beaten during the run. I tried presenting the data logs to him on the MA forum, that didn't go over so well.

[BrianG]

Austin, glad to have you here to explain (defend?) yourself, and appreciate the post.

I totally agree about the need for a more standard C rating. As a matter of fact, there is a thread about this very topic here. I think that any procedure MaxAmps comes up with will be questioned. TBH, any testing must be with an impartial third party against other competing cells. That way, no one can complain the results of the test were biased...

[kulangflow]

Austin, I appreciate you coming in here also. I didn't intend for this thing to blow up like it has.

I appreciate the new 8k pack, and I look forward to testing it (as best I can) when it gets here.

[lincpimp]

As far as my "bashing" goes, well it is my opinion.

On the subject of magazine polls, I would like some info about the people who polled. Have they owned and used packs from maxamps and all of the other lipo mfgs? Most likely not, as people do not like to spend thousands of dollars on batteries. And most people who participate in online polls have nothing better to do.

I have bought a lot of batteries, and do not have many maxamps packs left. I have tested all of them and settled on the packs that I found to perform the best. I am not emplyed by any battery mfg, and have not got any freebies either.

Austin, good luck with your business, I am also a business owner and understand your issues. I am sure you will continue rasing the bar, you have to in order to be competitive. Just be careful how your employees make you look!

[DrKnow65]

Austin, how about a discharge graph? I mean if it's all on the level, and your packs are so improved since last year, wanna throw us a bone?

I'm not a hater or sponsored. Just a guy who will be replacing a lipo pack that is less than a year old, been replaced twice already, and after the last time it quit working, I took it apart myself and have the dead cell is sitting on the counter. My 3S is now a 2S and I'd like to only spend the cash on a reliable replacement. I won't name the manufacturer, but I will say that it was most certainly still under warranty when I decided I would rather fix what was left of it than wait for the fourth potentialy flawed pack.

I have seen other manufacturers and sights with discharge graphs, why not post it? I mean you guys must test the cells once in a while right? mabey each time to get a newer better cell?

What cell do you want to see specifically? This is a new version of the 4000 cell vs the old version. The factory rates it at 4200mah. We rate it at 4000. This is the same cell that we use in our 8000 packs. At 20C, you can see that it holds what I would consider great voltage. I don't know how you could not call it a 20C constant cell based on the data...

-Austin

And here is the 3000 cells that we use for the 6000mah packs.

-Austin

I have a hard time releasing these because it gives our competitors an idea of exactly what they need to compete. As I have said many times, our pack quality and performance is second to none. The proofs in the graphs. I have not seen a 3000 cell or a 4000 cell on the market that will compete. If there was one, we would offer it.

-Austin

[DrKnow65]

Fair enough

Guess I need to get an eagletree data logger and figure out how many amps my 3.5lb 4wd 1/10 buggy is pulling ... I have had 2 3S 5000mah packs give out on this car running a MM and a 5700kv motor.

The most recent failure (and I believe the same failure that happened to the last pack but I didn't open that one up) was one of the cell's tab burning off. I'll post up a pic here in a bit.

The first batt I got wouldn't balance. Guess I must have just been in the small percentage of factory defects 3 times in a row...

[DrKnow65]

Edit, forgot to say thanks for posing up the graphs. It feels funny that so many people have askes sop many times with no responce, I ask once and here they are hahaha. Suppose I should have asked sooner :)

[DrKnow65]

[lincpimp]

I had the same thing happen with a few cells. I often doubt that the thin tabs can hadle the current, especially when it gets over 100amps.