9V rechargeable batteries and chargers?

Hi Folks,

At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not
to
be all that reliable anymore. Fairly new NiMH batteries peter out in
the
middle of a service and so on. No complaints, we got enough life out
of
this setup. So, looking for a new solution here. We have to stay with
9V
because the (expensive) wireless mikes need these and I'd would like
to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:

http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/dp/B0002WKD80/ref=pd_sim_sbs_hpc_30/180-3329658-7661802

They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?

Must be fully automatic, meaning stick the batteries in there no
matter
what their remaining charge is and leave them in the charger until
next
Sunday.

9V batteries with two LiIon cells in there are, of course, the
ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.

--
Regards, Joerg

http://www.analogconsultants.com/

"Joerg" <invalid_at_invalid.invalid> wrote in message
news:9n1htmF26vU1_at_mid.individual.net...
Hi Folks,

At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not
to
be all that reliable anymore. Fairly new NiMH batteries peter out in
the
middle of a service and so on. No complaints, we got enough life out
of
this setup. So, looking for a new solution here. We have to stay with
9V
because the (expensive) wireless mikes need these and I'd would like
to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:

http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/dp/B0002WKD80/ref=pd_sim_sbs_hpc_30/180-3329658-7661802

They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?

Must be fully automatic, meaning stick the batteries in there no
matter
what their remaining charge is and leave them in the charger until
next
Sunday.

9V batteries with two LiIon cells in there are, of course, the
ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.

--
Regards, Joerg

http://www.analogconsultants.com/

What about Varta?
http://www.en.varta-consumer.com/en/Products/Rechargeables/Power-Accus/9V-200-mAh.aspx#9V-200-mAh

All batteries will have a limited lifetime. I would say if you got a
year or two out of them, your doing good.

What about Varta?
http://www.en.varta-consumer.com/en/Products/Rechargeables/Power-Accus/9V-200-mAh.aspx#9V-200-mAh


Those are a bit marginal in capacity. Only 6 cells (so 8.4V) and 200mAh.

All batteries will have a limited lifetime. I would say if you got a
year or two out of them, your doing good.

"Joke"

What about Varta?
http://www.en.varta-consumer.com/en/Products/Rechargeables/Power-Accus/9V-200-mAh.aspx#9V-200-mAh


Those are a bit marginal in capacity. Only 6 cells (so 8.4V) and
200mAh.


** 8.4 / 1.2 = 7 cells.

Perfect for any radio mic that use a 9V battery.


All batteries will have a limited lifetime. I would say if you got
a
year or two out of them, your doing good.


** The OP is buying Chinese consumer level junk and expecting
professional results.


... Phil

Hi Folks,

At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not to
be all that reliable anymore. Fairly new NiMH batteries peter out in the
middle of a service and so on. No complaints, we got enough life out of
this setup. So, looking for a new solution here. We have to stay with 9V
because the (expensive) wireless mikes need these and I'd would like to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:

http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/...

They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?

Must be fully automatic, meaning stick the batteries in there no matter
what their remaining charge is and leave them in the charger until next
Sunday.

9V batteries with two LiIon cells in there are, of course, the ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.

--
Regards, Joerg

http://www.analogconsultants.com/

"Phil Allison" <phi...@tpg.com.au> wrote in message

news:9n1lfhFofiU1_at_mid.individual.net...







"Joke"

What about Varta?
http://www.en.varta-consumer.com/en/Products/Rechargeables/Power-Accu...

Those are a bit marginal in capacity. Only 6 cells (so 8.4V) and
200mAh.

 **  8.4 / 1.2  = 7 cells.

   Perfect for any radio mic that use a 9V battery.

All batteries will have a limited lifetime.  I would say if you got
a
year or two out of them, your doing good.

** The OP is buying Chinese consumer level junk and expecting
professional results.

...  Phil

Rechargeable 9v's always seemed to be marginal.
But, we had used the Vartas (NiCd) years ago, and they lasted for about
a year before they were toast.
They are a German company, the batteries are probably made in China.

Cheers- Hide quoted text -

- Show quoted text -

On Jan 9, 5:17 pm, Joerg <inva...@invalid.invalid> wrote:
Hi Folks,

At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not to
be all that reliable anymore. Fairly new NiMH batteries peter out in the
middle of a service and so on. No complaints, we got enough life out of
this setup. So, looking for a new solution here. We have to stay with 9V
because the (expensive) wireless mikes need these and I'd would like to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:

http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/...

They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?

Must be fully automatic, meaning stick the batteries in there no matter
what their remaining charge is and leave them in the charger until next
Sunday.

9V batteries with two LiIon cells in there are, of course, the ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.

--
Regards, Joerg

http://www.analogconsultants.com/

NEXcell seems pretty good for low self discharge. I used a couple AAAs
in a TV remote control. Still working today after 10 months on a
single charge. I see a 8.4 volt / 200mAh version here:

http://www.nexcellglobal.com/consumer.htm

Hi Folks,

At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not to
be all that reliable anymore. Fairly new NiMH batteries peter out in the
middle of a service and so on. No complaints, we got enough life out of
this setup. So, looking for a new solution here. We have to stay with 9V
because the (expensive) wireless mikes need these and I'd would like to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:

http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/...

They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?

Must be fully automatic, meaning stick the batteries in there no matter
what their remaining charge is and leave them in the charger until next
Sunday.

9V batteries with two LiIon cells in there are, of course, the ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.

--
Regards, Joerg

http://www.analogconsultants.com/

On Jan 9, 8:17 pm, Joerg <inva...@invalid.invalid> wrote:
Hi Folks,

At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not to
be all that reliable anymore. Fairly new NiMH batteries peter out in the
middle of a service and so on. No complaints, we got enough life out of
this setup. So, looking for a new solution here. We have to stay with 9V
because the (expensive) wireless mikes need these and I'd would like to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:

http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/...

They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?

Must be fully automatic, meaning stick the batteries in there no matter
what their remaining charge is and leave them in the charger until next
Sunday.

9V batteries with two LiIon cells in there are, of course, the ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.

--
Regards, Joerg

http://www.analogconsultants.com/

What's your problem you can't refurbish the chargers? If they're not
fast charge, they're dirt simple fixed current sources on a timer.

Not these. They are crammed with electronics, all uC controlled with
battery diagnostics and the whole enchilada. If I had a schematic I
could repair them. And I did repair one where somthing in the primary
switcher had blown. But those things don't seem to last and there comes
a point where repairing gets old. Also, it is absolutely no fun to find
out Sunday morning at 7:30am that all the batteries are dead and worship
service begins shortly. This happened three days ago

Fred Bloggs wrote:
On Jan 9, 8:17 pm, Joerg <inva...@invalid.invalid> wrote:
Hi Folks,

At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not to
be all that reliable anymore. Fairly new NiMH batteries peter out in the
middle of a service and so on. No complaints, we got enough life out of
this setup. So, looking for a new solution here. We have to stay with 9V
because the (expensive) wireless mikes need these and I'd would like to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:

http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/....

They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?

Must be fully automatic, meaning stick the batteries in there no matter
what their remaining charge is and leave them in the charger until next
Sunday.

9V batteries with two LiIon cells in there are, of course, the ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.

--
Regards, Joerg

http://www.analogconsultants.com/

What's your problem you can't refurbish the chargers? If they're not
fast charge, they're dirt simple fixed current sources on a timer.

Not these. They are crammed with electronics, all uC controlled with
battery diagnostics and the whole enchilada. If I had a schematic I
could repair them. And I did repair one where somthing in the primary
switcher had blown. But those things don't seem to last and there comes
a point where repairing gets old. Also, it is absolutely no fun to find
out Sunday morning at 7:30am that all the batteries are dead and worship
service begins shortly. This happened three days ago :-(

--
Regards, Joerg

http://www.analogconsultants.com/

On Jan 11, 6:36 pm, Joerg <inva...@invalid.invalid> wrote:
Fred Bloggs wrote:
On Jan 9, 8:17 pm, Joerg <inva...@invalid.invalid> wrote:
Hi Folks,
At church we use several Ansmann Energy 16 chargers and Tenergy 9V
batteries. Long story short they've been good to us but lately not so
much. The charge indicators on the stations fade and it all seems not to
be all that reliable anymore. Fairly new NiMH batteries peter out in the
middle of a service and so on. No complaints, we got enough life out of
this setup. So, looking for a new solution here. We have to stay with 9V
because the (expensive) wireless mikes need these and I'd would like to
move to 7-cell instead of 6-cell. Read some good reviews about the
Maha/Powerex brand:
http://www.amazon.com/PowerEx-MH-C490F-DCW-Worldwide-Battery-Charger/...
They also have low discharge 9V 230mAh batteries which sounds nice.
However, I am not familiar with this brand. Maybe someone here is? Or
knows of even better systems?
Must be fully automatic, meaning stick the batteries in there no matter
what their remaining charge is and leave them in the charger until next
Sunday.
9V batteries with two LiIon cells in there are, of course, the ultimate
cat's meouw. But they seem not to be ready for prime time yet, I could
not find multi-bay chargers and I am afraid someone will accidentally
stick them into a regular charger and .. KABLAM.
--
Regards, Joerg
http://www.analogconsultants.com/
What's your problem you can't refurbish the chargers? If they're not
fast charge, they're dirt simple fixed current sources on a timer.
Not these. They are crammed with electronics, all uC controlled with
battery diagnostics and the whole enchilada. If I had a schematic I
could repair them. And I did repair one where somthing in the primary
switcher had blown. But those things don't seem to last and there comes
a point where repairing gets old. Also, it is absolutely no fun to find
out Sunday morning at 7:30am that all the batteries are dead and worship
service begins shortly. This happened three days ago :-(

--
Regards, Joerg

http://www.analogconsultants.com/

If you don't want sudden drop-outs, use conventional top brand
alkaline e.g. Duracell + or whatever they're called over there. Plus
you really should have some of these for back-up if it's that mission
critical. ...

... In my experience (in good quality radio mics) they last
plenty of time and fail a bit more slowly/gracefully than I would
expect a rechargeable to. Plus since your batteries will always be
reasonably new, you will get a good feel for how often you need to
replace them as part of a regular replacement schedule.

On Wed, 11 Jan 2012 10:36:31 -0800, Joerg wrote:

Not these. They are crammed with electronics, all uC controlled with
battery diagnostics and the whole enchilada. If I had a schematic I
could repair them. And I did repair one where somthing in the primary
switcher had blown. But those things don't seem to last and there comes
a point where repairing gets old. Also, it is absolutely no fun to find
out Sunday morning at 7:30am that all the batteries are dead and worship
service begins shortly. This happened three days ago :-(

They might be old NiCd chargers that fail to spot the Delta V on newer
NiMh cells, so that they keep charging forever until you switch them off
or the safety timer, if any, turns them off.

On 9V cells charge is trickier because you have one Delta V point for
cell, which means that if the charger is sensitive it may stop charging
when the first cell reaches the charge, and if it's not sensitive it
could overcharge the battery, frying it in the long time.

For 9V batteries I'd always go with a current limiter (C/10, max C/5)
plus timer.

asdf wrote:
On Wed, 11 Jan 2012 10:36:31 -0800, Joerg wrote:

Not these. They are crammed with electronics, all uC controlled with
battery diagnostics and the whole enchilada. If I had a schematic I
could repair them. And I did repair one where somthing in the
primary
switcher had blown. But those things don't seem to last and there
comes
a point where repairing gets old. Also, it is absolutely no fun to
find
out Sunday morning at 7:30am that all the batteries are dead and
worship
service begins shortly. This happened three days ago :-(

They might be old NiCd chargers that fail to spot the Delta V on
newer
NiMh cells, so that they keep charging forever until you switch them
off
or the safety timer, if any, turns them off.


Those are very fancy uC-controlled chargers specifically designed for
NiMH. They cost north of $100 each.


On 9V cells charge is trickier because you have one Delta V point for
cell, which means that if the charger is sensitive it may stop
charging
when the first cell reaches the charge, and if it's not sensitive it
could overcharge the battery, frying it in the long time.


Yup, they need to find out the cell number and then count the number
of
delta-V events, plus time-out if they are too unequal. All not rocket
science but sometimes when I see charger designs my impression is that
for them a lot is like rocket science.


For 9V batteries I'd always go with a current limiter (C/10, max C/5)
plus timer.


That's a problem in a church as self-discharge in 9V NiMH is high.
You'd
have some batteries that are in there 1wk and other maybe 8wks. Trying
to get a rotating scheme going is totally not feasible in such a
scenario.

--
Regards, Joerg

http://www.analogconsultants.com/