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Ni-cd = ni-mh?

Old 09-16-2010, 04:58 AM
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paul cov
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Default Ni-cd = ni-mh?

Hi Guys, quick question, am running 6v 2600 mah Ni-mh power supply on my warbird 90 size but have just noticed that 4 of my 8 servos says Ni-cd use only?, will i have problems other than servo running slightly slower than quoted 0.16 sec/60 degrees, not electrician so simple explanation plz, thanks.
Old 09-16-2010, 06:38 AM
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David Bathe
 
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Default RE: Ni-cd = ni-mh?

Just enjoy.
Old 09-16-2010, 07:22 AM
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paul cov
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Default RE: Ni-cd = ni-mh?

Yes David i will be doing that, but dont want it to be short lived!.
Old 09-16-2010, 07:48 AM
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Default RE: Ni-cd = ni-mh?

I think your servos won't know if they are being fed by NiCad or NmH, so long as the voltage is correct. I'm guessing they are cautioning against use of some of the more exotic batteries around. I have been using NmH on my servos for years with no ill effect.
Old 09-16-2010, 08:28 AM
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Default RE: Ni-cd = ni-mh?

First, to the servos 6v is 6v, no matter if it gets it from a nicad, nimh, or regulated lithium so the torque and speed will be the same for a given voltage.

Now, about that NiCad only warning. Back in the day NiMH batteries had a higher internal resistance. That means that under load the voltage would drop off, sometimes to dangerous levels (especially with 4 cell packs that were easier to drag the receiver down to reset voltage).

Modern NiMH cells don't suffer that issue.

So fly happy
Old 09-16-2010, 07:44 PM
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paul cov
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Default RE: Ni-cd = ni-mh?

Excellent!, thanks guys.

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