Charging Ni-MH batteries

R

Rudolf

Guest
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
 
Rudolf wrote:
Hi, all
Click to expand...
Hi Rudolph.

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.
Click to expand...
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.


What would be the easiest way to trickle charge 3 batteries at a time?
Click to expand...
Trickle charge? Do you need to trickle charge, or is this just an
alternative?

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
Click to expand...
Option 4. buy one from Jaycar :)

it).

Any other ideas?

Thanks,
Rudolf
Click to expand...
Dale.
 
DSE have a charger that will take from 1 to 4 cells - I use mine lots

David

Rudolf wrote:

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
Click to expand...
 
Thanks,

Will check out Jaycar and DSE.

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

Rudolf

"quietguy" <postings@REMOVE-TO-REPLYconfidential-counselling.com> wrote in
message
news:460A2A3A.45105F96@REMOVE-TO-REPLYconfidential-counselling.com...
DSE have a charger that will take from 1 to 4 cells - I use mine lots

David

Rudolf wrote:

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
Click to expand...
 
Rudolf wrote:
Thanks,

Will check out Jaycar and DSE.

For some reason, all teh charges I saw were only taking even number of
batteries.
Click to expand...
DSE M9561

geoff
 
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

Rudolf wrote:

Thanks,

Will check out Jaycar and DSE.

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

Rudolf

"quietguy" <postings@REMOVE-TO-REPLYconfidential-counselling.com> wrote in
message
news:460A2A3A.45105F96@REMOVE-TO-REPLYconfidential-counselling.com...
DSE have a charger that will take from 1 to 4 cells - I use mine lots

David
Click to expand...
 
"Rudolf" <aus_electronics@rumatech.com> wrote in message
news:130k3el2b5vasc4@corp.supernews.com...
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
Click to expand...
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.
--
32°02'14.23"S 115°53'21.30"E
http://www.review-a-gadget.com/
http://members.iinet.net.au/~vanluynm/
 
On Wed, 28 Mar 2007 16:40:19 +1000, "Rudolf"
<aus_electronics@rumatech.com> put finger to keyboard and composed:

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

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.
 
On Sat, 31 Mar 2007 09:12:24 +1000, Franc Zabkar
<fzabkar@iinternode.on.net> put finger to keyboard and composed:

On Wed, 28 Mar 2007 16:40:19 +1000, "Rudolf"
aus_electronics@rumatech.com> put finger to keyboard and composed:

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

Build an adapter to charge them as a 3.6V pack from a cordless phone
base station.
Click to expand...
.... 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
--
Please remove one 'i' from my address when replying by email.
 
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