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  1. #1
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    Compatible batteries?

    Anyone know if the Traxxas 6700mAh 4s battery pack thats used in the Xmaxx will fit in the Maxx? Or is the pack too long?
    https://www.youtube.com/iftibashir

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    They should fit cause it's really 1/8 size

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    The Traxxas page for the Maxx lists the battery tray dimension, I believe

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    Quote Originally Posted by IftiBashir View Post
    Anyone know if the Traxxas 6700mAh 4s battery pack thats used in the Xmaxx will fit in the Maxx? Or is the pack too long?
    The 6700 Traxxas packs DO NOT fit. I tried them in hobby shop. The Traxxas 5000 will fit. A normal 139x48x48mm 4s pack is too big. Will have to use smaller packs.
    X-Maxx 8s / Maxx 4s / Rust 4x4 / TRX-4 Bronco

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    Quote Originally Posted by NitroStar View Post
    The 6700 Traxxas packs DO NOT fit. I tried them in hobby shop. The Traxxas 5000 will fit. A normal 139x48x48mm 4s pack is too big. Will have to use smaller packs.
    Darn it! - thanks for confirming.
    https://www.youtube.com/iftibashir

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    I can't believe traxxas makes the truck run on 4s but there battery doesn't fit the truck.

  7. #7
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    I heard there making smaller battery packs did anyone else hear this.im going to run my truck on 3s for now when I get it

  8. #8
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    There is a Traxxas 4s 5000mAh battery pack available now - looks like this one is smaller so will fit.
    https://www.youtube.com/iftibashir

  9. #9
    RC Champion nickruger's Avatar
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    The battery tray size is kind of a bummer. The width is the problem. After doing about a 15 minute search, I couldn't find a single hard case 4s battery that is under 45mm in width. I have a 3 SMC 6700mah 4s that I run in 3 different trucks that are too big. Sure seems traxxas really wants you to run their batteries.

    Sent from my SM-N960U using Tapatalk

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    Quote Originally Posted by nickruger View Post
    The battery tray size is kind of a bummer. The width is the problem. After doing about a 15 minute search, I couldn't find a single hard case 4s battery that is under 45mm in width. I have a 3 SMC 6700mah 4s that I run in 3 different trucks that are too big. Sure seems traxxas really wants you to run their batteries.

    Sent from my SM-N960U using Tapatalk
    Maybe you can turn this one sideways and secure a strap in place of the stock bracket? You may need to dremel some material away on the side where the leads need clearance.

    https://www.venompower.com/venom-50c...uni-plug-15031

    Dimensions: 138 x 47 x 45 mm
    Last edited by TwoBelugas; 10-06-2019 at 06:51 PM.

  11. #11
    RC Champion nickruger's Avatar
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    Quote Originally Posted by TwoBelugas View Post
    Maybe you can turn this one sideways and secure a strap in place of the stock bracket? You may need to dremel some material away on the side where the leads need clearance.

    https://www.venompower.com/venom-50c...uni-plug-15031

    Dimensions: 138 x 47 x 45 mm
    I was looking at a picture of the chassis, from the one picture it looks like you might be able to dremel that thin wall out and get the necessary mm before you would hit the center of the chassis. Realistically if you are willing to hack up a chassis you could resolve it. I wouldn't have a problem with it, not sure how many people feel the same.

    Sent from my SM-N960U using Tapatalk

  12. #12
    RC Champion RazorRC22's Avatar
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    I was going to buy one, but if I can't fit a 48mm wide battery in this thing, I'm cancelling my order!
    youtube.com/c/RazorRCvideos

  13. #13
    RC Champion RazorRC22's Avatar
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    Quote Originally Posted by RazorRC22 View Post
    I was going to buy one, but if I can't fit a 48mm wide battery in this thing, I'm cancelling my order!
    I messed around with the demo Maxx at the LHS store today.

    Width is about 46mm, my 46mm battery fit in perfectly. I have a 48mm that I could force in there in a pinch, but I would stick to 46, maybe 47mm max. My Awanfi 3S 5000mah hardcase fits PERFECTLY with no extra side to side room.

    Height-wise, it also fit my 38mm tall Awanfi battery perfectly with the stock foam spacer. If you remove the stick-on foam spacer, you could go up to about 43mm. I didn't measure it, but 43-44mm is what it looks like.

    So about 46 wide, 38/43mm tall (foam/no foam) is what I would aim for.
    Last edited by RazorRC22; 10-08-2019 at 04:53 PM.
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  14. #14
    RC Champion RazorRC22's Avatar
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    Just measured the Awanfi, it is 46.7mm wide. Fits perfect.

    My SMC 4S 5000mah is 47.9mm wide and you can jam it in there, but it’s not good.
    youtube.com/c/RazorRCvideos

  15. #15
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    Quote Originally Posted by RazorRC22 View Post
    I was going to buy one, but if I can't fit a 48mm wide battery in this thing, I'm cancelling my order!
    I felt same way but Traxxas does this with several RC's now. My local hobby store wasn't aware of this issue and are hoping to "sell a ton of them" but I showed them that they only had 1 4s lipo in the store that would fit it and it is a 140 dollar high end lipo. Can't sell many of these trucks without batteries to go in it.
    Sure cant fit two 2s packs in it.
    So are ya gonna cancel or what 4s lipo will you choose to go in it?
    X-Maxx 8s / Maxx 4s / Rust 4x4 / TRX-4 Bronco

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    Quote Originally Posted by NitroStar View Post
    I felt same way but Traxxas does this with several RC's now. My local hobby store wasn't aware of this issue and are hoping to "sell a ton of them" but I showed them that they only had 1 4s lipo in the store that would fit it and it is a 140 dollar high end lipo. Can't sell many of these trucks without batteries to go in it.
    Sure cant fit two 2s packs in it.
    So are ya gonna cancel or what 4s lipo will you choose to go in it?
    Isnít the 2888x that fits in the maxx 80 bucks from major vendors?

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    A SMC 4s 7200 fits perfect. Couple of videos with guys using them.

  18. #18
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    Quote Originally Posted by TwoBelugas View Post
    Isn’t the 2888x that fits in the maxx 80 bucks from major vendors?
    Yep, the 5000mAh 4s Traxxas battery fits too. The SMC is cheaper though and 7200mAh.

  19. #19
    RC Champion RazorRC22's Avatar
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    I only use hardcase batteries.
    youtube.com/c/RazorRCvideos

  20. #20
    RC Champion nickruger's Avatar
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    Quote Originally Posted by RazorRC22 View Post
    I only use hardcase batteries.
    Ditto

    Sent from my SM-N960U using Tapatalk

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    Quote Originally Posted by funmoneypit View Post
    A SMC 4s 7200 fits perfect. Couple of videos with guys using them.
    I wish SMC were available in the UK!!!!!
    https://www.youtube.com/iftibashir

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    I do t think the Traxxas chassis would flex enough for a soft lipo to be affected by it. I know the Arrma chassis do flex and damage them though.
    X-Maxx 8s / Maxx 4s / Rust 4x4 / TRX-4 Bronco

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    Just picked up my truck up if u take the black foam block out u can fit mostly anything in it

  24. #24
    RC Champion RazorRC22's Avatar
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    Quote Originally Posted by Albie72 View Post
    Just picked up my truck up if u take the black foam block out u can fit mostly anything in it
    It's the width (and height) that are the problem, not the length. I think with the black foam on the top out, it's about 43mm, which is still too short for a standard 4S full size Lipo
    youtube.com/c/RazorRCvideos

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    Directions say for 4s take out the foam spacer then install the battery pack spacer

  26. #26
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    Quote Originally Posted by Albie72 View Post
    Directions say for 4s take out the foam spacer then install the battery pack spacer
    Yes but they are assuming you are using a Traxxas battery.

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    Sorry read wrong the clip is for 3s but it's still loose I'll have to put a piece of foam

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    You could always just use a Pure-Tech Xtreme Quick Mounts (Large) then you could fit whatever packs you like

  29. #29
    RC Qualifier USMC1984's Avatar
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    This is why I only use Traxxas Batteries...less headache.

    The 2878 3s that I use in the X-Maxx fit perfectly in the Maxx after removing the foam block in the front of the tray.

  30. #30
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    Was hoping to use the Traxxas 6700mAh 4s packs from my X-Maxx, but if that's a no go then the cost of buying an additional battery on top of the MAXX itself just tips the scale over the edge for me - too much for a truck of this size......
    https://www.youtube.com/iftibashir

  31. #31
    RC Qualifier USMC1984's Avatar
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    Quote Originally Posted by IftiBashir View Post
    Was hoping to use the Traxxas 6700mAh 4s packs from my X-Maxx, but if that's a no go then the cost of buying an additional battery on top of the MAXX itself just tips the scale over the edge for me - too much for a truck of this size......
    I don't know which battery you're talking about without the number...if you mean the 2890 then no...you have one of the few X-Maxx batteries that does not fit.

    The common Traxxas bateries between the two are: 2889, 2888, 2878, 2872 and 2857.

    I hope that helps...

  32. #32
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    SMC 7200 mah 4s fits like a glove! The one that is made for the X-Maxx. Got two in yesterday. Thanks to Mach Speed Hobbies for this info in his YouTube videos
    X-Maxx 8s / Maxx 4s / Rust 4x4 / TRX-4 Bronco

  33. #33
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    Quote Originally Posted by NitroStar View Post
    SMC 7200 mah 4s fits like a glove! The one that is made for the X-Maxx. Got two in yesterday. Thanks to Mach Speed Hobbies for this info in his YouTube videos
    I have my maxx as well and have 4 runs on my smc 7200. Perfect for this truck! I run about a half hour and have some charge left when I turn off the truck.

  34. #34
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    Quote Originally Posted by USMC1984 View Post
    I don't know which battery you're talking about without the number...if you mean the 2890 then no...you have one of the few X-Maxx batteries that does not fit.

    The common Traxxas bateries between the two are: 2889, 2888, 2878, 2872 and 2857.

    I hope that helps...
    Yup, as luck would have it - I have the 2890's!
    https://www.youtube.com/iftibashir

  35. #35
    RC Qualifier USMC1984's Avatar
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    Quote Originally Posted by IftiBashir View Post
    Yup, as luck would have it - I have the 2890's!
    Grrr!

    I made a chart so I could keep track of battery compatability between cars...it really helps.
    That said, I simply lucked out with the Maxx and the 2878s as it wasn't on the chart initially.

  36. #36
    RC Champion RazorRC22's Avatar
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    Quote Originally Posted by USMC1984 View Post
    This is why I only use Traxxas Batteries...less headache.
    Quote Originally Posted by USMC1984 View Post
    Grrr!

    I made a chart so I could keep track of battery compatability between cars...it really helps.
    That said, I simply lucked out with the Maxx and the 2878s as it wasn't on the chart initially.


    The battery thing is just stupid. I have a new battery coming in today that should fit, keeping my fingers crossed.
    youtube.com/c/RazorRCvideos

  37. #37
    RC Qualifier USMC1984's Avatar
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    Quote Originally Posted by RazorRC22 View Post


    The battery thing is just stupid. I have a new battery coming in today that should fit, keeping my fingers crossed.
    Which battery thing?

  38. #38
    RC Champion RazorRC22's Avatar
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    Quote Originally Posted by USMC1984 View Post
    Which battery thing?
    This entire thread. Or more accurately, the fact we even need a thread.
    youtube.com/c/RazorRCvideos

  39. #39
    RC Qualifier USMC1984's Avatar
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    Quote Originally Posted by RazorRC22 View Post
    This entire thread. Or more accurately, the fact we even need a thread.
    So, what's the answer?

    Should there just be one battery and all cars need to accomodate it?

    I'm not trying to be a jerk, I just don't see it as that much of an issue or something that can be avoided.

    ...what's your solution?

  40. #40
    RC Champion RazorRC22's Avatar
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    Quote Originally Posted by USMC1984 View Post
    So, what's the answer?

    Should there just be one battery and all cars need to accomodate it?

    I'm not trying to be a jerk, I just don't see it as that much of an issue or something that can be avoided.

    ...what's your solution?
    It's dead simple. Standard 4S Lipo is about 47x47mm. All RC cars that run on 4S should be able to fit it. Every other non-Traxxas car on the market can handle it, Traxxas decided not to.

    Most companies just use velcro battery straps that can any size battery.
    youtube.com/c/RazorRCvideos

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