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  1. #1
    RC Qualifier
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    May 2011
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    279

    Very hot NiMh batteries?

    Ran My E-revo for the first time today. It was about +8 outside. Both the esc, and 550 motors were barely warm, but the batteries I couldn't even hold. What's up with this? Is this normal? Everything is all stock with long rockers installed.

  2. #2
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    Mar 2012
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    Ni-mh batteries get pretty hot during the discharge cycle. After running my merv through a battery cycle the ni-mh battery was around 150f.

    It's crazy how hot they can get.

  3. #3
    RC Turnbuckle Jr. mike-susieq1's Avatar
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    Nov 2010
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    California
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    4,840
    nimh batteries seem like they cant provide the amp draw needed for brushless systems. both the 1/10 and 1/16
    DEU 8:18 ESV

  4. #4
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    May 2011
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    Ok thanks guys. I've never had a "hot potato" battery from a stock rc which is why I was asking. Perhaps I'll resolve this with some lipos. We will see. Thanks again guys.

  5. #5
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    Jan 2011
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    Yep my nimhs were always smokin hot to the touch after runs. They often burned the shrink wrap too. This was my tipping point in going lipos

  6. #6
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    Nov 2007
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    In my experience, this happens more frequently and the temperatures rise when the batteries age. When I was running a touring car many years back, my 2400 pack initially ran cool but gradually began warming up more and more over two years.

    You can mitigate this by using a good charger, not charging at excessively high rates, and keeping a rotation of batteries so you allow the packs to rest.

  7. #7
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    Quote Originally Posted by turbo_cat1 View Post
    In my experience, this happens more frequently and the temperatures rise when the batteries age. When I was running a touring car many years back, my 2400 pack initially ran cool but gradually began warming up more and more over two years.

    You can mitigate this by using a good charger, not charging at excessively high rates, and keeping a rotation of batteries so you allow the packs to rest.
    Or by jumping to 2s lipos

  8. #8
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    Nov 2007
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    424
    Yeah yeah yeah....

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