Nickel Metal Hydride Batteries

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acforn@zoominternet.net - 30 Oct 2008 23:58 GMT

I am trying to get back into the hobby again. My equipment is about
5 yrs. old. I have the wall plug type trickle chargers, by Futaba
and 2
12 volt peak chargers, by Hobbico. Can I use them to charge the new
type
Nickle Metal Hydride receive packs that I need for some of my planes?

Andy

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Morgans - 31 Oct 2008 00:04 GMT

>I am trying to get back into the hobby again. My equipment is about
> 5 yrs. old. I have the wall plug type trickle chargers, by Futaba
> and 2
> 12 volt peak chargers, by Hobbico. Can I use them to charge the new
> type
> Nickle Metal Hydride receive packs that I need for some of my planes?

Yes. They behave much the same as Ni-Cads, when it comes to charging. They
will peak charge on a peak charger, also. If using a dumb charger, just
charge longer, to take into account the higher capacities.

Signature

Jim in NC

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WTF - 31 Oct 2008 00:17 GMT

>I am trying to get back into the hobby again. My equipment is about
> 5 yrs. old. I have the wall plug type trickle chargers, by Futaba
[quoted text clipped - 4 lines]
>
> Andy

Your standard charger will do fine if the voltage is compatible but don't
use a NiCd fast charger. NiMH requires a special fast charger. Some
chargers can handle both.

Dave

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Morgans - 31 Oct 2008 01:36 GMT

> Your standard charger will do fine if the voltage is compatible but don't
> use a NiCd fast charger. NiMH requires a special fast charger. Some
> chargers can handle both.

Really?

I have been charging my metal hydrides with a standard fast field charger
for years, and never noticed any problems.

Signature

Jim in NC

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WTF - 31 Oct 2008 03:29 GMT

>> Your standard charger will do fine if the voltage is compatible but don't
>> use a NiCd fast charger. NiMH requires a special fast charger. Some
[quoted text clipped - 4 lines]
> I have been charging my metal hydrides with a standard fast field charger
> for years, and never noticed any problems.

Either you've been lucky or your charger handles NiMH. The peak on NiMHs is
different from a NiCd. A standard NiCD fast charger can over charge and
kill your NiMHs.

Check out Red's Battery Clinic http://www.rcbatteryclinic.com/ and select
Nickel-Metal Hydride

Dave

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The Natural Philosopher - 31 Oct 2008 09:24 GMT

Really. The delta peak on NICd is large - 50mV or more, On NiMh its
small. A few mv at most.

*Some* older chipset equipped chargers cant detect that and will carry
on fast charging..

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Model Forum / Radio Controlled / Air Models / October 2008

Nickel Metal Hydride Batteries