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  1. #1
    RC Racer
    Join Date
    Jan 2013
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    Goshen, KY
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    ERBE overheating NIMH batteries.

    I just got a used ERBE and its awesome! After running the Erevo for around 10 minutes doing speed runs on the pavement, I stopped the truck for inspection. The 8.4v 7cell NIMH batteries were so hot, they started to melt the plastic wrap off the batteries. The batteries are name brand and are about 2 months old. The esc is set a factory default with the low voltage turned off since they are not lipo. Any idea why the batteries would do this?

  2. #2
    RC Turnbuckle Jr.
    Join Date
    Mar 2012
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    so cal
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    The system is really designed for lipo.batteries. the nimh don't supply enough juice

  3. #3
    RC Racer
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    Jan 2013
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    Traxxas use to sell the system with NIMH batteries correct?

  4. #4
    RC Qualifier
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    Jan 2013
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    The Netherlands
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    851
    Stock gearing?

    And NiMHs do get hot, due to the high internal resistance of NiMH cells and the huge currents demanded by the esc.

  5. #5
    RC Racer
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    Jan 2013
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    Goshen, KY
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    I just checked the gearing. Its 18/54. I'm guessing I should change it to 18/65? Will it make that much difference? Thanks guys!

  6. #6
    RC Qualifier
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    Yep 18/54 is a good gearing for 4S lipo. NiMH i would totally recommend 18/65

  7. #7
    RC Racer
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    Jan 2013
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    Thanks Guys! I'll change the gearing and see what happens.

  8. #8
    RC Turnbuckle Jr.
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    Mar 2012
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    so cal
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    Castle does not recommend nimh with the 2200
    I tried mine for 5 minutes went to lipo and never looked back!I have 4 of them sitting around collecting dust
    Last edited by 50togo; 02-24-2013 at 04:56 PM.

  9. #9
    RC Turnbuckle Jr. 87 GN's Avatar
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    Mar 2010
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    kansas
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    7,823
    Quote Originally Posted by gb77 View Post
    I just checked the gearing. Its 18/54. I'm guessing I should change it to 18/65? Will it make that much difference? Thanks guys!
    yes going back to stock gearing 18/65 will help with the temps. the MMM will be much happier too..
    it will be even happier with Lipos...
    Would you go flip my truck back over??

  10. #10
    RC Racer
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    Jan 2013
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    Goshen, KY
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    Thanks 87 GN. Im sure I will be going lipo. Its going to be a few months though. I run lipo in my stampede vxl and its a beast. The MMM is running cool even though the batteries are way too hot.

  11. #11
    RC Champion
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    Aug 2012
    Location
    Central NJ
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    1,245
    The Nimhs just dont cut it. Even easy on the throttle they just dont have the capacity to supply enough current. The 18/65 will make it not as bad but still bad all the same and the truck will seem lame not even making 30mph.

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