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Products specifying alkaline batteries

E

Eeyore

Jan 1, 1970
0
BE said:
I just bought several Energizer Rechargeable "9v" batteries (NiMH) and,
thanks to a previous post, I looked at the fine print and, yes, it is
actually 7.2volts! It says: "Size 9v" - so they can claim it is a 9v
battery due to the loose use of the term "9v" to indicate a "size" rather
than a power potential.

Why would the makers of these rechargeables make them not truly match the
voltage they are supposed to be?

Because they like fat profits ?

Buy the chaep ones instead. I did and it is actually 9V.

Graham
 
D

Dave Plowman (News)

Jan 1, 1970
0
I just bought several Energizer Rechargeable "9v" batteries (NiMH) and,
thanks to a previous post, I looked at the fine print and, yes, it is
actually 7.2volts! It says: "Size 9v" - so they can claim it is a 9v
battery due to the loose use of the term "9v" to indicate a "size" rather
than a power potential.
Why would the makers of these rechargeables make them not truly match the
voltage they are supposed to be?

Because upping the number of cells within the same package may not result
in any real benefits. Indeed, apart from increasing the cost, it may end
up with a lower capacity. It depends on how sensitive the device is to
voltages at the lower end of what an alkaline cell produces.
 
D

Dave Plowman (News)

Jan 1, 1970
0
Because they like fat profits ?
Buy the chaep ones instead. I did and it is actually 9V.

If you're talking Ni-Cads or NiMH, it's unlikely to be a 8 cell PP3 if
cheap.

The initial open circuit voltage of a Ni-Cad is pretty irrelevant. After a
short time under load it will settle at 1.2v per cell and stay there for
most of the usable range. Alkalines are dying from the second they're
used. ;-)
 
M

Meat Plow

Jan 1, 1970
0
Maybe more important, rechargeables don't start with the same voltage
level as fresh alkalines, and if the unit counts on the voltage being
above a certain point, the useable "life" of the rechargeable will not be
so long (though of course, they can be recharged).

I used to have something, it might have been my Radio Shack Model 100
laptop, that I used rechargeables in, and they sure didn't last as long as
alkalines. On the other hand, the rechargeables could be recharged so I
got more long term life out of them than the alkalines.

Michael

I'm a ham and what's important to me is that the current in rechargables
remains constant until the end of the charge. It's important in power
hungry portable ham radio gear to have that constant current until it's
time to recharge.
 
P

pebe

Jan 1, 1970
0
Dave said:
[email protected] wrote:--
I just bought several Energizer Rechargeable "9v" batteries (NiMH)
and, thanks to a previous post, I looked at the fine print and, yes,
it is actually 7.2volts! It says: "Size 9v" - so they can claim i
is
a 9v battery due to the loose use of the term "9v" to indicate a
"size" rather than a power potential.

Why would the makers of these rechargeables make them not trul
match
the voltage they are supposed to be?--
-
Because they like fat profits ?-
-
Buy the chaep ones instead. I did and it is actually 9V.-

If you're talking Ni-Cads or NiMH, it's unlikely to be a 8 cell PP3 if
cheap.

The initial open circuit voltage of a Ni-Cad is pretty irrelevant
After a
short time under load it will settle at 1.2v per cell and stay ther
for
most of the usable range. Alkalines are dying from the second they're
used. ;-)

--
*Why don't you ever see the headline "Psychic Wins Lottery"?

Dave Plowman [email protected] London SW
To e-mail, change noise into sound.
Coming back to the original posting, the manufacturer was probabl
suggesting the use of alkaline batteries is preferred - as agains
carbon zinc types with their inherently poor shelf life and leakin
electrolyte
 
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