Parts/Batteries & charging/Connectors & wire/Traxxas Series Battery Wire Harness (NiMH Only)
Traxxas Series Battery Wire Harness (NiMH Only)
Traxxas

Traxxas Series Battery Wire Harness (NiMH Only)

Part # TRA3063X2.8(5)
Where to buy
$8.00
AMain Hobbies
Seen Oct 12, 2026
$8.00Buy
Prices are as last seen at the store; stock is not tracked.

About this part

Harness Overview:

Traxxas Series Battery Wire Harness. Use the series harness to combine battery voltage and unlock the 50+mph speed potential of your model. Dual-battery operation requires attention to precautions outlined in the model's owner's manual. Follow all precautions to ensure peak performance and reliability of your model and batteries. Traxxas parallel and series Y-harnesses are for use with 2/3A battery packs only.

Reviews2.8 · 5 reviews

Daisuke Katchion Traxxas Series Battery Wire Harness (NiMH Only)

"NiMH Only" There is a reason why Traxxas puts "NiMH Only" on the product. But, I tried with LiPOs anyway. LOL I've used 2 packs of 2S LiPos to make up to 4S, 16.8V. You want to make sure your ESC and the motor can accept the voltage increase before you try. As long as I don't go crazy and check the motor temp frequently, it seems to be working fine. Again, please ensure the ESC and Motor can accept the increased voltage you plan to put. Otherwise, it may ruin the ESC or Motor. Be careful! Do it at your own risk and responsibility! Meanwhile, I chatted with Traxxas Live Chart and asked why it, TRA3063X, says "NiMH Only" they told me there is a risk of unbalanced cells and may ruin the battery cells. This is true as I've seen unbalanced cell voltage when the LiPo cut-off kick in. So, my recommendation is to check the battery level and each cell frequently while using TRA3063X with LiPO. "Never discharge a LiPo battery below 3.0v per cell. Ideally, you never want to go below 3.2v per cell to maintain a healthy battery. 2.9v per cell and lower is causing permanent damage." I've manually set the LiPO cut-off voltage at 3.5V to be safe. But, I usually end my run at 3.7 ~ 3.8V for each cell anyway. As you know LiPO batteries aren't cheap! LOL.

AnonymousVerified owneron Traxxas Series Battery Wire Harness (NiMH Only)

Works absolutely perfect I have had zero issues, plenty of power no need for a 3S

Jeff SmithVerified owneron Traxxas Series Battery Wire Harness (NiMH Only)

I plugged this into my 1/16 slash with two stock nimh batteries and now my esc is fried! The wheels started spinning full speed in my hands as the speed controller started to smoke. I'm not sure what happened but i cant recommend using this. There were no obvious special warnings to follow, but now my slash is smoked!

Marcio SilvaVerified owneron Traxxas Series Battery Wire Harness (NiMH Only)

Cuidado pois esse conector pois não serve em baterias LIPO. O anúncio não fala isso e acabei comprando errado Ele só serve pra bateria NIMH

Anonymouson Traxxas Series Battery Wire Harness (NiMH Only)

You've got a big brushless motor, beefy ESC, and you're thinking about using multiple LiPos to go 4S or 6S, transforming your 1:10 vehicle into a machine of such ferocious speed that men's knees buckle and women faint at the sight of it. So you buy the TRA3063X. You noticed that the wires seemed a bit anemic, but in your excitement you dismiss it. Imagine your disappointment, then, when it CANNOT CONNECT to your fancy Traxxas LiPo batteries. You look more closely and see a tiny "NiMH ONLY" stamped into the plastic. For today, your dreams have died. This battery Y connector gets 2 stars from me on account of bad packaging. Nowhere except in almost invisible letters on the plug are you warned that it DOESN'T WORK WITH LiPo BATTERIES. The plugs are actually slightly different, physically preventing you from mating the two ends. Does the product work? Probably! But who's trying to get top speeds with NiMH batteries!?

What reviewers say

Reviewers largely agree the harness is marked NiMH Only and that using LiPo packs with it is risky. One verified owner reported a fried ESC after plugging it into a 1/16 vehicle with two stock NiMH packs, and another said the warning was hard to notice. A different reviewer reported running two 2S LiPo packs in series (4S) with careful monitoring, but noted the manufacturer advises against it due to cell imbalance risk. A verified owner using NiMH packs reported no problems and considered the power adequate. The reviews are few and mixed on experience, so overall confidence is moderate.

  • + Works without issues with NiMH packs
  • + Adequate power for owner
  • + Connects two packs in series
  • − Marked NiMH Only; LiPo use is risky
  • − Warning on product is easy to miss
  • − Reported ESC failure with NiMH packs
  • − Thin wires criticized
Summary generated from the reviews above.

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