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  1. #1
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    Single 6S Battery

    Give it to me straight. I got 2 different answers from Traxxas support. Can I use a single 6S in my UDR or not. Just got it yesterday. 1 guy said yes and one said no. I think the reason for no is because they don't make a single 6S. I like buying Traxxas vehicles but I want honest answers.. Thanks for your time. Sorry auto correct battery.
    Last edited by Cars76; 04-11-2018 at 07:25 PM.

  2. #2
    RC Champion fourdub's Avatar
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    I too am waiting for someone to say they have tried this and what their experience is.

    Me personally, I'm gonna use 2x 3s packs, that way if a cell goes bad, i can replace a cheaper 3s battery, than lose and replace a 6s battery.

    I only run mine on 4s traxxas 6700's so far.

    Interested to hear what others who have the UDR, say about a single 6s pack.
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  3. #3
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    I would assume yes as long as you use the plug that comes with the truck to complete the circuit.

  4. #4
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    I have a single 6s pack. If I have to buy 2 3's I will. But if I don't have to..... Is it fast enough on the 4s?

  5. #5
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    That's what I am thinking. But don't want to burn down the rig for some stupid reason..

  6. #6
    RC Champion fourdub's Avatar
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    Well, on 4s its a fun truck, it is a handful. it is kinda slow, but for what it is, its very very good.

    4s will break the rears free and let ya drift pretty good.

    i did reduce the weight by removing the spare tires, and added a spoiler to increase downforce on the rear (was nose heavy before i took the tires off lol).

    Not sure 6s is needed, but to some, its needed for the sheer power of it. i ran 3 6700's in a row without heat problems.

    but i am a light to moderate basher.

    this is about the highest I've jumped it, on the single jump on our circle track.

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  7. #7
    RC Champion MaXXL's Avatar
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    Well, in my old novak esc, one plug powered the BEC and the other is just for the motors. So its possible that using a single 6s will fry your ESC.

    That is an oldddd esc. From the 90s or early 2000s. So idk take it with a grain of salt
    10 RCs and counting 😅

  8. #8
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    in principle you sure can run a 6s single pack. two 3s packs in series is nothing else than one 6s pack for the esc. you just have to change the connectors. the two plugs on the esc are only for "convenience" to have two plugs. but what they do between those two plugs is just connecting the packs in series with the wire.

    i for myself always change the esc to only one plug and connect the batteries in series but in principle its the same.

    this is not comparable to the old novak or evx2 because they had four wires with two seperate plugs each having with a + and - pole. and that lead to the "problem" wit the BEC feeding from only one side.

    bye,
    rhylsadar
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  9. #9
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    When my UDR pre order from Amain comes in,

    I'm going to try out a 6s 5000mAh 6S 35~70C battery, swap out everything to XT90.
    Its similar in size to 2 Traxxas 3S 5000 mAh Lipos.

    Going to connect it to a spare Sensored Castle Creations 2200kV and MMX ESC.

  10. #10
    RC Champion MaXXL's Avatar
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    So as long as you have only 2 power wires coming from your esc (one + one -), then yes it should be fine. But you'll still need to make a jumper connector to plug into whichever connector is left open.
    10 RCs and counting 😅

  11. #11
    RC Champion fourdub's Avatar
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    UDR comes with a jumper for the unused plug, when using single battery
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  12. #12
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    Quote Originally Posted by fourdub View Post
    UDR comes with a jumper for the unused plug, when using single battery
    Every where I read you can only use 4s. But I think that's because Traxxas does not make a single 6s

  13. #13
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    Quote Originally Posted by Cars76 View Post
    Every where I read you can only use 4s. But I think that's because Traxxas does not make a single 6s
    Where are you reading that?

    Just go straight to the product page: https://traxxas.com/products/landing...-desert-racer/

    ESC can use 4s-6s

  14. #14
    RC Champion fourdub's Avatar
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    he ment, that traxxas says to use 2x 3s packs, because they don't sell a 6s pack.

    he knows they do 4s-6s hehehehe
    Sla2hvxl,pe4evxl,erevobl
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  15. #15
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    Quote Originally Posted by fourdub View Post
    he knows they do 4s-6s hehehehe
    Lol. I just got a really bad idea. What if some one made a 12S UDR
    Guess who's back.
    Back again.

  16. #16
    RC Champion fourdub's Avatar
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    Kevin Talbot is already running one on 8s max6 i believe....
    Sla2hvxl,pe4evxl,erevobl
    "Richard Chilson"youtube

  17. #17
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    I'm running a single 6s with xt90's. It's slow on 4s about 30mph ide say. I'm also using a mamba monster esc. Already posted my setup on the udr Facebook page. The lipo I'm using is from a company that traxxas doesn't particularly like.

  18. #18
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    Quote Originally Posted by Dragonfueled1 View Post
    I'm running a single 6s with xt90's. It's slow on 4s about 30mph ide say. I'm also using a mamba monster esc. Already posted my setup on the udr Facebook page. The lipo I'm using is from a company that traxxas doesn't particularly like.
    what size/capacity is the battery?
    Im going to do the same thing, but not sure on dimensions that will fit

  19. #19
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    5000 6s
    157x46x45

  20. #20
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    Yup. I have a gens ace single 6s 5000 35c in mine with jumper. Runs great. Did have asstock servo fail about run#5. Installed new servo and it was about to burn up?? Something goin on??!!

  21. #21
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    Im running a single 6S SMC 7200mAh 90C battery, have 2 of them, they are a tight fit.
    someone mentioned in the other battery thread that they might puff in long run.
    https://forums.traxxas.com/showthrea...=1#post6456314

  22. #22
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    I as well am running the smc 7200 mah 6s batteries. They do fit really tight. But they give some killer run times.
    If it still moves, it aint broke enough!

  23. #23
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    YES. I had to remove the fold over gate to fit it in, but it does. Runs great. With the app, and only mod is the Traxxas lite kit, 49mph.

  24. #24
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    I run a Max Amps - 6000 mah - 100 c = single battery set-up and it's giving the UDR great performance as well as good run times !!!! I've ran it on single a Venom 4s battery also …. but this truck likes 6s better !!!! who am I to argue with the truck ….. it likes what it likes !!!!
    Xmaxx , XO - 1 , Slayer Pro , UDR , E-Revo

  25. #25
    RC Champion akrimmel's Avatar
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    If your not using MAXX AMPS, your robbing this of true 150c discharge JMHO. They make several single and dual battery setups.
    U.D.R. IN FULL MOD MODE
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  26. #26
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    MaxAmps is the biggest scam in the RC industry. Speed run guys that pull over 300 amps figured that out years ago.

  27. #27
    RC Champion akrimmel's Avatar
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    Quote Originally Posted by LibertyMKiii View Post
    MaxAmps is the biggest scam in the RC industry. Speed run guys that pull over 300 amps figured that out years ago.
    Sorry for ya, but IME nothing but killer performance in all my BL setups
    U.D.R. IN FULL MOD MODE
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  28. #28
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    Max Amps are not what they claim to be. Their C ratings are truly over inflated!! But to each their own. To me they are just way overpriced.

  29. #29
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    I tired to use a 8400 3 cell Lipo but it does not seem to work. My throttle wont work only my steering when I turn the wheel on the controller that is my throttle. What is my issue?

  30. #30
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    You may have the throttle and steering wires reversed on your receiver. Check your wiring at the receiver.

  31. #31
    RC Champion akrimmel's Avatar
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    100% you can use a single 6S.

    Sent from my SM-G935T using Tapatalk
    U.D.R. IN FULL MOD MODE
    MMX SUMMIT 2200KV!

  32. #32
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    1 or 2 6S Batteries?

    Glad I found this thread as I had the same question. I'm thinking about getting the UDR and if I do I want to use a single 6S battery from SMC True Spec here... (22.2V, 7700mAh, 120C) which is what their site recommends specifically for the UDR.

    So I just called Traxxas Support (spoke with Chris-he was alright but I've spoken to much friendly reps at Traxxas btw) and I asked him if I can run 1 battery on 6S in the UDR using the jumper. He said, "We don't offer a single 6S battery. (then there was a long awkward pause-lol) ...I can only recommend a Traxxas battery for Traxxas products...we don't even carry a 6S." When I asked him if it's possible, he said he couldn't "advise on that but it will run on a single 4S or 2 Traxxas 3S's". It was almost like he started reading from a script when I started asking more questions about it

    So if the UDR comes with a jumper to run two 2S batteries for 4S total power, then why couldn't it run the same for 6S power? Or can this eventually hurt the ESC or other electronics in the long run, maybe causing resistance at some level with using the jumper for 6S power???

    My gut feeling is this is a marketing ploy since Traxxas currently doesn't offer a single battery that is 6S power...

  33. #33
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    Quote Originally Posted by Nickerz View Post
    Glad I found this thread as I had the same question. I'm thinking about getting the UDR and if I do I want to use a single 6S battery from SMC True Spec here... (22.2V, 7700mAh, 120C) which is what their site recommends specifically for the UDR.

    So I just called Traxxas Support (spoke with Chris-he was alright but I've spoken to much friendly reps at Traxxas btw) and I asked him if I can run 1 battery on 6S in the UDR using the jumper. He said, "We don't offer a single 6S battery. (then there was a long awkward pause-lol) ...I can only recommend a Traxxas battery for Traxxas products...we don't even carry a 6S." When I asked him if it's possible, he said he couldn't "advise on that but it will run on a single 4S or 2 Traxxas 3S's". It was almost like he started reading from a script when I started asking more questions about it

    So if the UDR comes with a jumper to run two 2S batteries for 4S total power, then why couldn't it run the same for 6S power? Or can this eventually hurt the ESC or other electronics in the long run, maybe causing resistance at some level with using the jumper for 6S power???

    My gut feeling is this is a marketing ploy since Traxxas currently doesn't offer a single battery that is 6S power...
    It will most definitely run 6s on a single battery, all you will need is a jumper so that you can use one plug. As for performance I'm not sure whether a single 6s would be as good as 2 3s batteries because there will be a lot of current draw.
    The present is theirs; the future, is mine.

  34. #34
    RC Racer Nickerz's Avatar
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    Thumbs up A Single 6S Battery w/Jumper Is Perfectly Fine To Use...

    I also asked a guy who I trust (he helped with the iCharger and really knows his stuff). After sending him the link of the UDR ESC, specs, etc., and telling him what Traxxas said, he got back to me and confirmed using a single 6S battery won't make any difference or cause any issues with the electronics. His exact words were...

    "...only the total number of cells in series count, so using your single 6s pack is totally fine as the ESC is rated for 6s."

    I also sent him the link for the jumper connector and asked about the volts mentioned on Traxxas' website here... and he then said...

    "22.2V is the rating under load (3,7V x 6s), whereas 25.2V is the rating fully charged (4.2V x 6s). So both mean the same cell count. The ratings at different states of charge often lead to confusion, also at cordless tool battery packs for example. 10.8V and 12V tool packs are both 3s, or 18V and 20V are both 5s. The good thing about standards is that there are so many of them..." (sarcastic)
    "Anyway, you are good to roll, have fun."

    So it does sound like Traxxas "advising against it" is a non issue. That and plenty of others on here already doing it and no complaints that I've read about.

    I'm planning on buying the SMC 6S here... which will give a longer run time & SMC says fits the UDR. They also have a 3S here... which I think would also fit the UDR since the specs are equal to or less than the 6S lipo that is recommended for the UDR.

    Can anyone confirm the dimensions of the UDR's battery compartment? I wrote down...

    181mm x 46mm x 56mm

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