http://www.rcmart.com/catalog/images/yrac_lp-0032_news.gif (http://www.rcmart.com/catalog/advanced_search_result.php?sort=1a&keywords=LP-0032)

Discharge rate: 20C
Capacity:3200mAh
Voltage:7.4v
Length: 137.5mm
Width: 46.7mm (17.5mm radius sides to emulate stick pack shape)
Height: 23mm (20.5mm height between bumps)
Net: 210g


Included:
T-plug (1pc)
Heat Shrinking Tube (2pcs)

Why go Li-Po?
Runtime up to 30% longer than traditional NiMH/NiCd (of the same capacity)
Weight up to 40% lighter than traditional NiMH/NiCd (of the same capacity)
Li-Po power delivery ensures maximum power throughout the discharge cycle
Less internal resistance offered by advanced cell fusion technology.
Less energy lost in form of heat makes a greater power output.
Complicated maintenance-free or conditioning-free.
Balancing port included
Compatibles 90% of 1/10 scale chassis with little or zero modification
Can be used and recharged unlimited times per session
Less cost over time as longer lifespan up to 10 times that of NiMH/NiCd
Sealed case makes perfect for tracks looking

Click below link to order:-
It will arrrive on end April 2008
http://www.rcmart.com/catalog/advanced_search_result.php?sort=1a&keywords=LP-0032

Yeah Racing Li-Po Packing Pack
7.4V 3200mah 20C (Item No: LP-0032)
MSRP Price : US$49.90
Discount Now at Only US$34.99

Good News for 1:10 RC Car fans!
Introducing you the new Li-Po battery released by Yeah Racing,
which is specially designed for the 1:10 RC car

http://www.rcmart.com/catalog/images/yrac_lp-0032_new.jpg (http://www.rcmart.com/catalog/product_info.php?cPath=52_973&products_id=25829)

Super Light, ~ 41% less than traditional battery
http://www.rcmart.com/catalog/images/yrac_lp-0032_007.jpg
http://www.rcmart.com/catalog/images/yrac_lp-0032_008.jpg

Use on Carbon Chassis ?? No problem!
http://www.rcmart.com/catalog/images/yrac_lp-0032_012.jpg
http://www.rcmart.com/catalog/images/yrac_lp-0032_011.jpg

Use on Tamiya Series?? Yup!
http://www.rcmart.com/catalog/images/yrac_lp-0032_009.gif
http://www.rcmart.com/catalog/images/yrac_lp-0032_010.gif
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http://www.rcmart.com/catalog/images/yrac_lp-0032_006.jpg (http://www.rcmart.com/catalog/product_info.php?cPath=52_973&products_id=25829)

Is this a ROAR approved hard case?

it should be it's the same construction as the orion carbon.I just bought 6 of these on friday so I will post on the performance as soon as I get them and put a few cycles on them.

by the way just for everyones benefit these are acually cheper to order through rc mart's ebay store ,dinball. it was going to cost 249.00 shipped for 6 at the rc mart website, but it was only 229.00 shipped for 6 at their ebay store. Which seems kinda backwards to me since through ebay there are listing fees and paypal fees to pay on a sale, but hey cheaper is cheaper!!!

Is this a ROAR approved hard case?

it should be it's the same construction as the orion carbon.I just bought 6 of these on friday so I will post on the performance as soon as I get them and put a few cycles on them.

There is more to ROAR approval than just the hard case. The batteries must undergo some pretty strenuous tests to make sure they don't catch fire when treated in a manner that would be considered rather extreme but might happen from common accidents or errors (like incorrect charger settings).

Please post test results as soon as you can. I've tested previous NiCd and NiMh packs that had were significantly cheaper and had claims that they had x capacity or y discharge rates and in reality were nowhere near what they claimed.
A good 20C lipo pack is going for $80 - $100 these days so these sound like a bargain IF the test results stand up to the claims.

I have purchased a couple of them and their 1/18th scale packs from dinball. It is my first dip into lipos for 10th scale and 18th scale and i have used yeah racing stuff for my 18th scale alot.

I can do my own testing at that price ill let every one know how it went when im doon.

Mine should be here in the next couple days. I ordered 6 packs . i will post the results compared to an orion carbon 3200 by friday.

Mine should be here in the next couple days. I ordered 6 packs . i will post the results compared to an orion carbon 3200 by friday.
The interesting question will be: what is their cycle life compared to the Orions? We probably won't find that out for a while.

Anyone try one in a B4 buggy? At 47mm its pretty wide. Just wanna make sure.

If the center channel for the battery is the same as the T4 it probably is too wide. My channel is 1.83 wide and thats about it. Pretty snug fit!

47mm should = 1.85" Not gonna happen.

I bought two a couple weeks ago for dirtoval this summer and one is in my B4EDM with no chassis mods so it fits a B4 buggy just fine. Haven't raced with them yet, but ran them around the driveway a bit and performance seemed to be fine. Only time will tell i guess.

Jason

delete

I have a MaxAmps 6000mah lipo pack that is 44mm and it just fits so 47 is out of the question. Thats in a T4 truck.

Ran the small 18th scale batteries last night and was very impressed. Lots of power and was able to run 8 minutes and that was where i just got tired of looking at the car going round and round. Ran it in my losi slider with a mamba and trinity cobalt motor. A definate increase over a 1400 nimh. Was easy to charge also on the charger i purchased from dinball too. They are a looser fit than i thought in the battery hold down. may need to have something to not let it slide nearly as much in the car.

The interesting question will be: what is their cycle life compared to the Orions? We probably won't find that out for a while.
iam sure as long as they are charged and not overdischarged the cycle life will be fine.I mean i have seen a couple orions last over2 years with no sign of fade, but that's because they dont get cooked at 8 or 10 amp charge like some guys do to them.which is just SILLY.

I have a MaxAmps 6000mah lipo pack that is 44mm and it just fits so 47 is out of the question. Thats in a T4 truck.T-4 I just got them and they fit my T-4 fine. alittle snug, but you dont have to force them or any thing. will post tomorrow on performance guys.

WOW is all I have to say. I just ran 2 of these batteries. 1 in my 17.5 buggy, and 1 in my 8.5 mod truck.They ran just as good as an orion 3200.very punchy, and consistant through the whole charge until the li-po cutoff kicked in.definitrly a BIG bang for a small buck!!We will see how they perform over the long haul, but as long as a proper charge rate is used and they dont get over charged/discharged i think they will do just fine.we will see how the do at the litchfeild round 1 of theMORL series this weekend.

420, thats really great news. Never thought they would fit in there. May be buying a few of these myself. I wonder how they would fit in my TC5.:woohoo::woohoo::woohoo:

batteries performed great over the race weekend at litchfeild.was using around 1300 mah in a 5 minrun with 17.5 2wd buggy, and just over 1400 mah in 2wd mod truck running a 8.5. Had plenty of punch with both.these are definitely the most bang for your buck li-pos out there!! I am going to order up a few more just to keep on hand for bashing and practicing.

Can these be balanced charged like the orions, or do you need a balancer?

you need a balancer, they use the white 3-pin style plug like soft case li-pos do.

420, how are the batteries working out for you so far.

just fine t4. They are plenty punchy, and peak off at 8.4v. out of the 6 I ordered there does not seem to be a weak one.all perform reliably and are pretty much equall to one another. they are good enough that all my 4200's are gone to a new home.Racing with enough li-pos that my son and I could put the chargers away after 2 rounds of qualifying was WAY nice.it made the rest of the race day VERY enjoyable not having to worry about traying batteries and all that hub-bub.

Thats great news 420. Congratulations on a great find for a reasonably priced lipo. Now I know I'm buying some of these!

Ran the two that i had on wednesday night on the dirtoval. Seemed to be just fine to me. I didn't get a full charge in either of them all night and both seemed fine. I had one hit the Lipo cutoff and it took about 2000 seconds to get it back up when i got it home that night, but like 420 said, both topped out at 8.4.

Jason

I recently switched to Li-Po with my RC10-B4 running a 5.5turn Novak brushless. I purchased from Maxamps the 5000ma & 3000ma packs, the TrueRC 4000ma pack and the YeahRacing 3200ma pack.

Testing each pack for capacity and voltage drop under load, as well as ability to provide the stated continuous output current I have come to the following conclusions:

MaxAmps significantly overrate their C rating and their 20C packs are in reality 10C packs as at 20C the battery generally only delivers 1/3 of their stated output capacity by the time it hits 6V as well as generating dangerous levels of heat. If you think of them as 10C packs though, they are fine.

Both TrueRC and Yeah will deliver their stated capacity at their continuous C rating at an acceptable voltage (over 7V).

At a 40A load the Yeah battery delivers 0.1v more than the TrueRC battery across its discharge curve. At 40A the 3000ma MaxAmps battery did very badly (even thought it is rated at 60A cont) and was trailing between 0.7 and 0.5v below the other batteries.

I had to shave off about 1mm from the side of the Yeah hard case in order to get the pack easily in and out of the B4. Without shaving that 1mm off it was a very tight fit and hard to get the battery back out. But as the case is so thick, 1mm is no problem at all.

jorg from what i have heard from more than a few companies like maxamps and others the c rating is based on what current a battery can handle discharging to a given voltage and not greatly reduce the packs lifespan.
this is where the problem is.
there are 3 basic factors to consider. 1 discharge rate, 2 cutoff voltage, 3 expected life cycle. if a lab has the proper equipment they can easily test the first 2 assuming everyone agrees on the same cutoff. then comes the "quality of lifecycle" in which not every company will use the same guidelines.
your tests are a good indicator of what will happen between the packs you have assuming you used the same discharge rates and cutoff.
if rc racers really want to know how packs from different companies compare it will require that all tests are done with the same equipment and guidelines.

kvrc, I do test the batteries in a consistent way to allow me to make fair comparisons between them. I use the Futaba CDR-5000 to place a constant current draw on the battery and record the voltages over time at 4 second intervals. I use Fluke multimeters to verify the voltages and I have a hyperion charger / balancer connected to the balancing port of the batteries to get voltage readouts of each individual cell while discharging them so that there are no nasty surprises of a single cell failing without me noticing it.

I view the continuous C rating as a current load a battery can handle where it still gives you the stated capacity of the battery at over 6v, ideally though at a more useable voltage of 7v+. I never really considered the life expectancy of the battery.

Both TrueRC and Yeah batteries definitely can supply their stated C rating for the full claimed capacity of the battery. MaxAmps batteries barely stay over 3v per cell the moment you put their C load on them and drop to below 3v per cell before they have even delivered 1/3 of their stated capacity. On top of that they reached 155 degrees which is not really all that great either. I really do not see how they can justify their C rating under these circumstances. MaxAmps continuous rating is what the others would consider their peak burst rating.

Considering the MaxAmps batteries are more expensive than both TrueRC and Yeah and have such poor performance it is amazing that they are still in business. And with the Yeah battery coming in a hard case, it really is good value.

yes it does get confusing because i dont think all the companies are using the same ratings and not the same equipment.
as far as i am concerned, everyone who is really concerned about the performance of their packs neds to just cycle their packs once in a while with high quality stuff like a turbo 35.
just figure out what your average amp draw is for your car and cycle it down to a voltage that is approx equal to what it would be with what the car would do in a given run. no need to take it all the way down further than what the car can do like in the olden days of nickel batteries.

Has anyone opened these up yet to find out what brand of cells are being used?

I guess it's a long shot that they would be Kokam cells, but worth asking.

I have removed the cells out of their hard casing to see how easy it would be to make 6400ma 14.8v packs without having to carry 4 hard casings, but inside the hard casing they have black heatshrink that has no text or markings on it, and I have not taken the heatshrink off as I have no heatshrink to put back on after I would peal it off.

The cells themselves are narrower than the cells used by MaxAmps and TrueRC. I tried to put their cells into the casing but there was no way they would go in.

If I can get some black heatshrink I will pull the heatshrink off and see if the cells themselves have a serial number or something like that on them.

Will these batteries fit in a TC5

Wow...it is my first experience with lipo so I placed them in my Drift tc4 set up and went and played for 30mins on a 13.5 motor....my eyes hurt cause i didnt blink....then i really wanted to see what would happen so i placed it in my other tc4 with a 3.5 novak and ouch....it literally in 5 mins of running blistered a set of perelli T tires in a parking lot...we talk in big cars about the 4 link mods getting up on the bars, well it did...it would get the 3.5 motor up on the tops of the tires and even at a coast your could pull the trigger and the batteries allowed for the boast again....i continued to run the pack after seeing the tires were going away for another couple of minutes and plenty of run time.

hey 420 what are you chargeing your 3200 at?

3.2a charge rate. The formula for charging li-pos is ; total capacity(3200mah) divide by 1000 = your rcomended charge rate (3.2a).

Ok...thanks 420...i was being cautious i guess and going with only 2.5 amps. And with the mini batteries going with 1.5. Both had good punch still.

Another question with you guys is this. My GTB i dont believe has a lipo cut off or my SS+, so should i get one of those to run from novak?

I'd still like rcmart to come back on and state if they know what type of cells are in the case and if they have been submitted for ROAR approval yet.

if yeah racing dont do it , I WILL relabel them and submit a batch myself!

if yeah racing dont do it , I WILL relabel them and submit a batch myself!
That would be nice, since Yeah Racing probably wont do it. But then you might find out that the don't stand up to the tests the ROAR uses and that is why the cost is low.

That's my concern. It's not so much that I care if they are ROAR approved, but that they can withstand the approval process.

Looking forward to hearing more about them...definitely interested for the price.

That would be nice, since Yeah Racing probably wont do it. But then you might find out that the don't stand up to the tests the ROAR uses and that is why the cost is low.
they would have to . the #'s are accurate, and the cases are stout. as for cell quality , the cells are WAY better than the crappy trinity li-pros, and they met approval, so I am pretty confident that they would meet approval.

The trinity packs are garbage.

As to the Yeah batteries, I'm sure they're not Kokam cells (guessing based on price) which is the only thing that would prevent them from running in the spec class with the Orion and Peak. But for the price, they'd make a great pack for nearly any other 6-cell class.

i have a mamba max 5700 in a b4 would could i expect for runtimes

I am running a novak 8.5 in my t4 and I am getting an easy 12-15 min. out of these packs to the li-po cut-off . It's long enough that by the time the li-po cut-off cuts out my eyes are dry and I am ready to quit anyway!

i run the mamba with mine and made two 5 min heat races before a charge with the 6700 motor.