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Basic rechargeable batteries question

N

Ninad Tipnis

Jan 1, 1970
0
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

Thanks,

Ninad Tipnis
 
D

Donald

Jan 1, 1970
0
Ninad said:
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

Thanks,

Ninad Tipnis

chemistry
 
M

martin griffith

Jan 1, 1970
0
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

Thanks,

Ninad Tipnis

Phlogiston


martin
 
Ninad said:
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

Thanks,

Ninad Tipnis

Because you touch yourself at night.
 
P

Peter Bennett

Jan 1, 1970
0
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

Thanks,

Ninad Tipnis

The voltage of any battery (rechargeable or disposable) depends on the
chemical reactions that occur within the battery.



--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
new newsgroup users info : http://vancouver-webpages.com/nnq
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca
 
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

Rechargeable batteries generate electricity by a different chemical
reaction than that used in alkaline batteries

http://www.answers.com/topic/rechargeable-battery

http://www.answers.com/topic/rechargeable-battery

and that is why the nominal voltages are different. If you searched on
chemical thermodynamics and Gibbs free energy you might find a more
detailed explanation - I studied it in my second year at university
(1961) and retain very little of it.
 
P

Phil Allison

Jan 1, 1970
0
"Ninad Tipnis"

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.


** Because that is what the chemical reaction inside generates.

Batteries are products of chemical engineering - not the efforts of
electronics designers - they can only do what the laws of chemistry allow.
A good performing, rechargeable cell that generated a steady 1.5 volts would
be sensation in the battery market place.

Luckily, the 1.2 volt NiMH ones we have now are very useable in most
devices originally intended to use non rechargeables. This is because that
1.2 volts of output is quite steady during discharge - unlike alkalines etc
that constantly lose output voltage as they go - right down to 0.8 volts
before they are exhausted.






........ Phil
 
D

default

Jan 1, 1970
0
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

Thanks,

Ninad Tipnis

The battery chemistry determines the voltage. Change plate material
and you change the voltage out for a given electrolyte.

1.2 volts will almost always work in place of 1.5 volt primary cells -
the battery keeps putting out 1.2 volts for most/all of its life -
unlike 1.5 volt alkaline or zinc carbon batteries which droop from the
time you start drawing power.
 
H

Homer J Simpson

Jan 1, 1970
0
I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

It's because of a plot by the Great Satan.
 
M

Michael A. Terrell

Jan 1, 1970
0
Ninad said:
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.


This is not a design question. It belongs on


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
P

Paul E. Schoen

Jan 1, 1970
0
Ninad Tipnis said:
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

It's a 20% penalty levied by the Bush administration to discourage
renewable energy!

Al Gore
 
D

D from BC

Jan 1, 1970
0
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V
nominal
voltage? and not 1.5V as the case for alkaline batteries.

Thanks,

Ninad Tipnis
..
-----------------
Wish I really knew.. I'm still stuck on why a nail and a penny
stuck in a lemon produces electricity.
Apparently 4 lemon batteries lights an LED!
As an hobbyist/designer I just see 1.5V and 1.2V and other
specs...I try to stay in the electronics domain and avoid
chemistry.
Besides, I didn't do so well in chemistry and it's messed up my
electronics work sometimes. So I recommend learning chemistry
...And physics,..and math and ...Damn it! It's endless!! I'm
warning you...Do you really want an answer to that battery
question because once you're down that rabbit hole.... there's
no getting out. :)
D
Sorry...after seeing some of the funny replies to this thread I
had to add.
 
J

jasen

Jan 1, 1970
0
Hi,

I would like to why AAA/AA/C/D rechargeable batteries have 1.2V nominal
voltage? and not 1.5V as the case for alkaline batteries.

different chemicals => different voltage

the word for today is "electronegativity"


Bye.
Jasen
 
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