Re: Batteries, was Re: istD Histogram display

[Tom Ivar Helbekkmo]

"Doug Franklin" <[EMAIL PROTECTED]> writes:

>> See  for information on rechargeable
>> batteries.  (It's a site for radio control modelers, a group of people
>> who really, really appreciate (and need) good batteries.)
>
> It's a good site, but you have to keep in mind the way R/C (car)
> folks use batteries.

Those people are weird.  :-)  However, Red isn't one of them.

> If you ask a battery engineer, [...]

That, in fact, is exactly what Red is.  He's retired now, but has
spent his life working as an expert on rechargable batteries.

-tih
-- 
Tom Ivar Helbekkmo, Senior System Administrator, EUnet Norway
www.eunet.no  T: +47-22092958 M: +47-93013940 F: +47-22092901

Re: Batteries, was Re: istD Histogram display

[Doug Franklin]

On Thu, 13 Nov 2003 12:00:23 +0100, Tom Ivar Helbekkmo wrote:

> See  for information on rechargeable
> batteries.  (It's a site for radio control modelers, a group of people
> who really, really appreciate (and need) good batteries.)

It's a good site, but you have to keep in mind the way R/C (car) folks
use batteries.  I say this as an (ex) electric R/C person.  The charge
and discharge rates, for example, are very high.  In a 1:10 scale 4
minute race, the batteries are discharged at rates up to 30A or so. 
They are typically charged at 5A or more.  If you ask a battery
engineer, I suspect their view would be that the R/C car folks abuse
their batteries.  Not being a battery engineer, I don't know how the
usage profile affects the life cycle profile of the cells.

TTYL, DougF KG4LMZ

Re: Batteries, was Re: istD Histogram display

[Leonard Paris]

Truthfully, I too prefer a proprietary rechargeable battery.  As long as it 
is a Lithium ion rechargeable with capacity equal to (or better than) the 
BP511 that Canon uses in the D30, D60.

Len
---
* There's no place like 127.0.0.1

From: Mark Roberts <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Re: Batteries, was Re: istD Histogram display
Date: Wed, 12 Nov 2003 14:37:36 -0500
"Bill Owens" <[EMAIL PROTECTED]> wrote:

>This reminds me of Michael Reichman's gripe about using AA batteries and
>having to carry a charger if you used NiMh batteries.  He prefers a
>proprietary rechargeable.
I thought that part of his review was really bizarre. The multiple power
supply options are one of the things that Pentax really did right, IMHO.
--
Mark Roberts
Photography and writing
www.robertstech.com
_
MSN Messenger with backgrounds, emoticons and more. 
http://www.msnmessenger-download.com/tracking/cdp_customize

Re: Batteries, was Re: istD Histogram display

[Tom Ivar Helbekkmo]

Otis Wright <"rusty."@att.net> writes:

> Have seen statements suggesting NiMh batteries lose 1%-2% of their
> charge a day.  Can't remember how good the source was.  Maybe
> someone else has more accurate numbers.

Compared to NiCd, NiMH pack a bit (30% to 50%) more capacity into the
same volume and weight, but they give you a lower voltage during
discharge (bad for applications that pull a bit of current), they
self-discharge about three times faster, they don't work in freezing
temperatures (nor do they like extreme heat), they must be replaced
about three times as often, and they can't be charged nearly as fast.

See  for information on rechargeable
batteries.  (It's a site for radio control modelers, a group of people
who really, really appreciate (and need) good batteries.)

-tih
-- 
Tom Ivar Helbekkmo, Senior System Administrator, EUnet Norway
www.eunet.no  T: +47-22092958 M: +47-93013940 F: +47-22092901

Re: Batteries, was Re: istD Histogram display

[Herb Chong]

yes. the difference being that proprietary batteries usally are smaller and
lighter for a given capacity. me? the batteries for a day's worth of my
shooting aren't nearly as much as the memory and lenses.

Herb
- Original Message - 
From: "Bill Owens" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 12, 2003 11:58 AM
Subject: Batteries, was Re: istD Histogram display


> This reminds me of Michael Reichman's gripe about using AA batteries and
> having to carry a charger if you used NiMh batteries.  He prefers a
> proprietary rechargeable.  Doesn't he still need to carry a charger,
unless
> of course he wants the camera out of commission while the battery is
> charging in camera?

Re: Batteries, was Re: istD Histogram display

[Mark Roberts]

"Bill Owens" <[EMAIL PROTECTED]> wrote:

>This reminds me of Michael Reichman's gripe about using AA batteries and
>having to carry a charger if you used NiMh batteries.  He prefers a
>proprietary rechargeable. 

I thought that part of his review was really bizarre. The multiple power
supply options are one of the things that Pentax really did right, IMHO.

-- 
Mark Roberts
Photography and writing
www.robertstech.com

Re: Batteries, was Re: istD Histogram display

[Otis Wright]

Have seen statements suggesting  NiMh batteries lose 1%-2% of their 
charge a day.  Can't remember how good the source was.  Maybe someone 
else has more accurate numbers.

Otis Wright



Bill Owens wrote:

I saw those advertised, but my local store only had the 1-hour chargers.
Still, I reckoned that was probably good enough; I can recharge a set of
batteries while I'm out using up the first set.
What's the capacity of the 15-minute cells?  I've got mostly 1800 mAh for
my one-hours, although I've also got several 1600s lying around for the
cordless phones, wireless mousen, etc.
   

The 15 minute cells are 2000 mAh.  I also have some cell ranging from
1500-1800 mAh that I use in either the 1 hour charger, or the Pentax charger
(which only does slow charges).  It's interesting that with the 15 minute
cells, a cooling fan runs in the charger.  With any other cells, it's a 7-8
hour charge with no cooling fan running.  Evidently there's something in the
15 minute cells that the charger "reads" to turn on the fan
Does anyone know how long charged NiMh cells can be stored in a charged
state before  they discharge enough to require a recharge?
 

At present I still carry regular disposable batteries as well for use in
the FTZ500 (and the MZ-S battery grip).  If I could find the documentation
I'd see if I can use NiMh rechargeables there, too - does anybody know?
   

I don't know about the BG-10 grip, but I do use NiMh in the 360FGZ

Bill



 

Re: Batteries, was Re: istD Histogram display

[Bill Owens]

BTW, I also have a 400 watt inverter that I can use with the chargers as
well as the laptop and printer while I'm "in the field".

Bill

- Original Message - 
From: "John Francis" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 12, 2003 1:23 PM
Subject: Re: Batteries, was Re: istD Histogram display


> >
> > The use of AA's was one of the selling points for me.  I already had
about 5
> > sets of batteries and 2 chargers.  However, I recently picked up one of
the
> > new Ray-O-Vac 15 minute chargers and 6 batteries for it.
>
> I saw those advertised, but my local store only had the 1-hour chargers.
> Still, I reckoned that was probably good enough; I can recharge a set of
> batteries while I'm out using up the first set.
>
> What's the capacity of the 15-minute cells?  I've got mostly 1800 mAh for
> my one-hours, although I've also got several 1600s lying around for the
> cordless phones, wireless mousen, etc.
>
> At present I still carry regular disposable batteries as well for use in
> the FTZ500 (and the MZ-S battery grip).  If I could find the documentation
> I'd see if I can use NiMh rechargeables there, too - does anybody know?
>
> I already have far too many different kinds of batteries, anyway. There
> are the button cells for the MX & Super Program, the 2CR5 for the PZ-1p,
> the regular MZ-S batteries, and all the various little cells for the
> data backs, the *ist-D, etc.  I definitely liked the fact that the *ist-D
> would run on AAs, especially since I went for microdrives as storage.
>
>

Re: Batteries, was Re: istD Histogram display

[Bill Owens]

> I saw those advertised, but my local store only had the 1-hour chargers.
> Still, I reckoned that was probably good enough; I can recharge a set of
> batteries while I'm out using up the first set.
>
> What's the capacity of the 15-minute cells?  I've got mostly 1800 mAh for
> my one-hours, although I've also got several 1600s lying around for the
> cordless phones, wireless mousen, etc.

The 15 minute cells are 2000 mAh.  I also have some cell ranging from
1500-1800 mAh that I use in either the 1 hour charger, or the Pentax charger
(which only does slow charges).  It's interesting that with the 15 minute
cells, a cooling fan runs in the charger.  With any other cells, it's a 7-8
hour charge with no cooling fan running.  Evidently there's something in the
15 minute cells that the charger "reads" to turn on the fan

Does anyone know how long charged NiMh cells can be stored in a charged
state before  they discharge enough to require a recharge?

> At present I still carry regular disposable batteries as well for use in
> the FTZ500 (and the MZ-S battery grip).  If I could find the documentation
> I'd see if I can use NiMh rechargeables there, too - does anybody know?

I don't know about the BG-10 grip, but I do use NiMh in the 360FGZ

Bill

Re: Batteries, was Re: istD Histogram display

[John Francis]

> 
> The use of AA's was one of the selling points for me.  I already had about 5
> sets of batteries and 2 chargers.  However, I recently picked up one of the
> new Ray-O-Vac 15 minute chargers and 6 batteries for it.

I saw those advertised, but my local store only had the 1-hour chargers.
Still, I reckoned that was probably good enough; I can recharge a set of
batteries while I'm out using up the first set.

What's the capacity of the 15-minute cells?  I've got mostly 1800 mAh for
my one-hours, although I've also got several 1600s lying around for the
cordless phones, wireless mousen, etc.

At present I still carry regular disposable batteries as well for use in
the FTZ500 (and the MZ-S battery grip).  If I could find the documentation
I'd see if I can use NiMh rechargeables there, too - does anybody know?

I already have far too many different kinds of batteries, anyway. There
are the button cells for the MX & Super Program, the 2CR5 for the PZ-1p,
the regular MZ-S batteries, and all the various little cells for the
data backs, the *ist-D, etc.  I definitely liked the fact that the *ist-D
would run on AAs, especially since I went for microdrives as storage.