Charging Ni-MH batteries

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Rudolf Contact options for registered users 's Avatar (by Gravatar) posted on
March 28, 2007, 6:40 am
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Hi, all

Friend has a particular device that uses 3 Ni-MH AAA batteries. The problem
is that all chargers we saw charge 2 or 4 batteries. None will take 3.

What would be the easiest way to trickle charge 3 batteries at a time?

So far we have few ideas:
1. Build our own charger (not the easiest way out)
2. Have few sets of batteries so that even number of batteries can be
charged (messy)
3. Have some sort of a "battery emulator" that wll sit in a charger as a
fourth battery (just a wild idea at this time, did not really investigate
it).

Any other ideas?

Thanks,
Rudolf



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dale-google Contact options for registered users 's Avatar (by Gravatar) posted on
March 28, 2007, 7:23 am
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Re: Charging Ni-MH batteries



Rudolf wrote:
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Hi Rudolph.


If you need to charge 3 Ni-Mh batteries external to the device then
you can get them. Jaycar sell at least one that does this and is run
from the supplied 12V SMPS or a cigarette lighter plug. It has a
separate LED for each cell, and fast charges. AA or AAA batteries.


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Trickle charge? Do you need to trickle charge, or is this just an
alternative?

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Option 4. buy one from Jaycar :)

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Dale.


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quietguy Contact options for registered users 's Avatar (by Gravatar) posted on
March 28, 2007, 8:41 am
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Re: Charging Ni-MH batteries


DSE have a charger that will take from 1 to 4 cells - I use mine lots

David

Rudolf wrote:

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Rudolf Contact options for registered users 's Avatar (by Gravatar) posted on
March 28, 2007, 10:25 pm
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Re: Charging Ni-MH batteries


Thanks,

Will check out Jaycar and DSE.

For some reason, all teh charges I saw were only taking even number of
batteries.

Rudolf

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Geoff Contact options for registered users 's Avatar (by Gravatar) posted on
March 28, 2007, 11:20 pm
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DSE  M9561

geoff



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quietguy Contact options for registered users 's Avatar (by Gravatar) posted on
March 29, 2007, 8:40 am
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Re: Charging Ni-MH batteries


My DSE Universal charger has space for 4 batteries, but I can just pop 1,2,3,or
4 in and it works fine - it also has a switch to choose NiCads or NiMH.  I
bought it about 2 years ago and use it for my Digital camera batteries
regularly

David

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Murray R. Van Luyn. Contact options for registered users 's Avatar (by Gravatar) posted on
March 29, 2007, 3:54 pm
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Hi Rudolf,

Considered buying 3 extra batteries and charging 2 or 4 at a time when all 6
are flat?

Regards,
Murray R. Van Luyn.
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Franc Zabkar Contact options for registered users 's Avatar (by Gravatar) posted on
March 30, 2007, 11:12 pm
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Re: Charging Ni-MH batteries


On Wed, 28 Mar 2007 16:40:19 +1000, "Rudolf"

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Build an adapter to charge them as a 3.6V pack from a cordless phone
base station.

- Franc Zabkar
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Franc Zabkar Contact options for registered users 's Avatar (by Gravatar) posted on
April 1, 2007, 12:32 am
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Re: Charging Ni-MH batteries


On Sat, 31 Mar 2007 09:12:24 +1000, Franc Zabkar

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... or adapt an old mobile phone (eg Ericsson A2618S) that uses a pack
of 3xAAA NiMH cells. Then you'd have an AC adapter, a cigarette
lighter adapter, and an intelligent charger with a state-of-charge
display.

- Franc Zabkar
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