SMC 40C+ C-Max 7.4V Hardcase Lipos
 

Were proud to release info on our new 40C+ C-Max Hardcase packs.

The first 2 packs will be available by the middle of January.


Part # 3240CM 3200mAh / 7.4V / 40C+

Retail: 140.00 Street Price 94.95

Size: L 136mm x W 46.5mm x H 20.5mm

Top exiting wire Black colored hardcase with 12 gauge wires and Deans connector.




Part # 5240CM 5200mAh / 7.4V / 40C+

Retail: 192.00 Street Price 124.95

Size: L 138.5mm x W 46.5mm x H 24.5mm

Top exiting wire Black colored hardcase with 12 gauge wires and Deans connector.





Were confident that our new 40C+ series will offer the best possible performance. Early tests shows that the IR of these new packs is 15% to 20% better than our closest competitors packs.

Here are numbers on four 5000 sample packs we received this week. Actual production packs will have a bit better runtime as were going with a slightly bigger case/cell to help capacity.

All packs were charged at 2C on a Hyperion Duo Balance charger. Packs discharged on a T35GFX/Lipo at 35 amps. Voltage sensing leads attached on the 12 gauge wires were the female Deans is soldered. Pack and room temp was 72 degrees. Packs below are sample packs and actual production packs will have 530+ runtime.


#1 505 - 7.43 - 5.7

#2 507 - 7.45 - 5.1

#3 512 - 7.45 - 5.5

#4 510 - 7.44 - 5.5

Sweet

LoL !

batterys
 

Can we pre-order them. if not who will be the first place to get them.Thanks,

Danny how about a 4s hard case 5000? or even a soft case 5000. I can special order a 4s 5000 40c soft case? Use 1/8th electric guys need these batteries.

Thanks for the help,
Joe

We don't sell directly but the usual places that stock our products will get them when the become available. I should have a better idea of the release date in a few weeks. Cells are in production now.

Joe please look at this thread we are going to release a softcase 40C+ C-Max 5000/4S pack for the 8th scale guys.

http://www.rctech.net/forum/electric...fo-wanted.html

Danny ..... on your other thread you stated that you are also going to have a new pack with 4mm built connectors for over seas. Do you have any numbers on this pack now? .... V - RT - IR and pack size .... Also, will it be available in the US ..... thanks

Your right we will release an EFRA based pack in the C-Max 40C+ series. This pack will also be sold in the US and other countries so it won't be exclusive to Europe.

As far as specs go the cells aren't done/ready yet. So I have no info except that we expect the capacity to be 4200+ and possibly as high as 4500. When doing a pack with inboard connectors you sacrifice cell size which reduces the capacity. The EFRA rules also means the case needs to be 1mm thinner than our 5000 case so that will also impact capacity.

I will post the info when I get it from our supplier.

Thanks .... I'll keep checking back ..... a 4200+/- w/ 40C+/- in the case size of +/- 136mm x 46.5mm x 20.5mm is perfect ... IMO .... one more thing ....

Can you post a chart on your new (Part # 3240CM) 3200mAh / 7.4V / 40C+ and one on your (Part # 4028LD) 4000mah 28C Competition so I might compare the two .... or a link where I could find one ..... THANKS AGAIN ....

Will we see a saddle pack 40c? Lookin to power a B44 this summer. :cool:

The EFRA pack should be 138.5 x 46.5 x 23

I will only have graphes once we receive our new packs.

No plans to release a 40C+ saddle as our 4900/25C packs have been very popular and we beleive most racers race mod in 4wd so if more power is required all that is needed is a lower turn motor.

:weird: ,,,,,,,,,, :lol:

Testing
 

I got a chance to run the new 40c pack. Since I really don't have any experience running two different lipo packs back to back I wasn't sure what the difference would be going to a higher C rate only. I did cycle the pack out on a GFX when I got it to compare to the 28C I have been running. Here are the numbers:

I used a friends GFX since mine is not updated for Lipo yet. He has it setup so that his leads all go to his Deans connector, meaning the main voltage leads and the small voltage sensing leads as well. I would assume with the voltage sensing leads going directly to the battery the numbers I got would be better for both packs? These cycles were done at 100dg.

my 28c
Runtime 510
Ave. v. 7.49
IR 4.6

new 40C
Runtime 513
Ave. V. 7.56
IR 3.2

I will try to get cycle numbers again with the voltage sensing leads hooked up the proper way.

Anyways from the cycle I'm thinking its not that big a deal going from the 28C to the 40C. I was wrong.

My plan was to run my 28C, then take the car off and recharge and then run again. Then, do the same with the 40C, so that both packs had a rerun on them as from what I've seen these lipo's always seem to run a lil better the more you run them in a day, and it would be a comparable test.

I got my runs done with the 28C so I had a good baseline. 9.1 hot lap with alot of 9.2's and 9.3's. This was on the 2nd run of the pack.

Then I put the 40C pack in to make its first run. 9.0 hotlap with a ton of 9.1's and a few 9.2's. Finished with a 9.1. It was a noticable difference, sort of like going up 2 teeth if you were undergeared. Rip from corner to corner was noticably better as well as top speed (which to me doesnt make much sense cause voltage its pretty close)

Now I am thinking man this is going to be really good on its 2nd run..and then I looked at the clock and had to leave..LOL. So i never got to do the 2nd run.

I'm going to try to do this test all over again either today or tomorrow if I have time, but the pack def. shows serious potential being it was better than my 28c pack even on its first and only run of the day.

All runs were done with the packs NOT heated. I never heat my packs and really only did it on the cycles cause A) the guy who's charger I was using had a lipo sack with the heater setup in it already B) Seems to be when people do cycle packs they heat them.

Well I hope this helps a lil if people were wondering about the new packs. Like I said I'll try to have more info up here either today or tomorrow.

-Donny Lia

Did you use that pack in the Regional? because your car was rippin the carpet up not one car had the speed or rip you had.

nope that was my 28c no heat. just got the 40c friday

-donny

Thanks for the update Donny.

We got 4 sample packs in last week and Donny got his on Friday. It's important to get actual track data as cycle numbers only give us an idea of what is going on.

Danny,

Having received the samples just last week, you have chosen to advertise them for sale seemingly quickly. (No pics, case size TBA, etc, etc.)

What tests do these have to pass in order to be up to "SMC's standards"? Is it strictly output related (like the intellect cell) or have you implemented some type of testing to guarantee X number of cycles/safety out of these? I know the lipo sack adds safety to the process, but does that mean we are less concerned about what goes on inside there? Basically, is there any 'crash testing' being done?

With the case size needing to be enlarged, I can't help but think that we're already headed down the road of increased sensitivity in terms of usage practices, at the risk of reduced reliability.

I know your production was on hold with the Intellect cell while they took care of the safety issues plaguing that product. What has this supplier said/done differently to gain your trust, and assure you that you won't be bringing to market another 'disposable cell'?

I'm anxious to see how fast these are, but the jump started release, citing only output specs, has me feeling a bit embarrassed as a consumer. From your "False Lipo advertising" thread on 11/19, you stated that 35C cells were possible only just recently, and now (12/16) you have a 40C pack. Lipo tech sure must be changing rapidly. Will 45C cells be available on 1/15/09, 50C on 2/15/09, etc? I'm really interested to see the difference on the track, since we don't race GFXes.

At least the Reedy 35C will have some competition - CE numbers for this pack look pretty close.

Rick I hope you guys changed suppliers as your 20C packs were pretty bad.

CarbonJoe: Yes Lipo technology evolves as there is new material breakthroughs. Recently there wa one with a chemical that has enabled higher C rate. This material was available 6 months or so ago but at that time it wasn't stable. Just recently has it become stable and this is why we can release new packs with higher C rates.

Since you read my post on False Lipo Advertising you must of noticed I claimed we weren't going to release 35C packs. Now you know why as I knew we could do 40C+. The reason why we didn't release the 40C+ packs earlier is that there is another imporvement that is possible that would boost the average voltage of the packs some more. Our supplier told us to give him some more time to test this and see if it will be reliable/stable. Since SMC is all about releasing the best possible products we decided to wait until our supplier finished his testing. The new improvement failed the stability/reliability tests so we will have to wait on this until they figure it out. This is why we are going with the 40C+ as we know this is reliable and stable.

In the past 6 months we could of released 30C , 33C and 35C but we wanted to wait for a bigger improvement. Now 40C+ is an improvement over our 28C packs so were releasing it.

Hope this answers you questions.

Believe you and trust, as Ae is honest and bet they actually underate their packs a little ...

Cherry so you tested there packs for C rate and capacity ? Please post your info ? Nothing like seeing results.

Don`t need to test , I have a Ae Team Driver tell me whats the best ...;)

Are you testing the packs your self now or getting the #'s from your supplier?

Wow you are pretty funny. You claim things you can't back up.

On the subject of AE Team drivers I would like to know one of them is or was using our packs instead of the AE packs ? That is in oval where power actually counts.

Anyway keep coming on these threads with your comments that you can't back up as it's pretty entertaining.

At the moment we get graphs from our supplier as we don't have the high amp capabilites needed to do C rate testing. We are purchasing equipment that will allow us to do our own tests. We will be able to go as high as 250 amps on a 2 cell pack. So we will be ready for 50C if it happens.

The haters crack me up :lol:
Same old.

50c? WOW...
:cool:

I will be able to test up to 50C which is good.

The standard method to test C rate is look at the capacity of the cells at full C rate discharge. Our cells have to remain at 90% of there rated capacity at a full discharge. Some manufacturers use 80% to get there C rate.

The reason why we call our new packs 40C+ is because we use 90%. Soon we will post graphs that will show our packs capacity at 40C and 45C as we should have 45C or more at 80% capacity retention. So we could have called our new packs 45C to be the first to offer it but we will continue to use 90% as this is what we have done from day one.

Sounds fast

Really not claiming anything cept knowing you would be coming out with a higher C battery will soon ...:lol:

and
C-On everyone knows Rick`s a expert ...

What?

You might have already answered this but, will the 5000mah 40c hardcase pack have the same dimensions as the present hardcase 5000 28c pack?
It looks like it is the same dimensions...

The 5000/40C will be in a slightly bigger case as oour current case wasn't to the max of the ROAR rules. It will be 2.5mm longer and .5mm higher.

Are these packs going to be available/legal in time for Snowbirds?

Yes as they will be in the hands of the ROAR lab on Friday. So as long as they get in before the 31st were o.k..

Wow. :lol::lol:

Heres are some test results some may like to see on our new 5000/40C+ cells. I asked our supplier test and show me the results of the cells used in our new packs. These are 2500 cells so our new 5000 will be 2S/2P. He couldn't test the cells in parallel as he doesn't have equipment that will allow him to test at 200 amps. He tells me that the results would be very similar using 2 cells in paralell.

We also sent him our competitors 40C/5000 pack so we can see what they are offering. I already have results from the GFX but I wanted to see what the cells were like at 40C.

I must say the cells they use are good but I was a bit surprised by the results as they claim there cells stayed at 90% at full C rate discharge and we see that they are at 84%. Our cells stayed at 91% and 90% is the standard we use to get our C rate. Many manufacturers use 80% so we will have them test our cells at 45C and possibly 50C to try and determine the C rate at 80%.