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Battery charging

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jbr79r(at)yahoo.com
Guest

Posted: Mon Mar 01, 2010 8:54 am Post subject: Battery charging

Hi Bob

I have been using Panasonic 17AH batteries (2) in my all electric airplane for a few years.   I usually change them out at annual time.  Someone recommended a 20 AH CSB from m&B battery company.  It is the same size and a few dollars cheaper.  Any comment?

Jim

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77



 

 [quote][b]

skywagon

Joined: 11 Feb 2006
Posts: 184

Posted: Mon Mar 01, 2010 9:39 am Post subject: Battery charging

James,

 Curious why you change them out so often. 

 I'll assume they are fairly expensive batteries.   

 Do you use a "maintainer" on them on the parked  days...?  I use Concords and Gill.  These get maybe changed out in 5  years, but, they always have a maintainer attached during off flying  periods.  When I do change them out they are still functioning normally  but, like you, there is a period limit that one feels comfortable.

 Dave

   

 [quote]   ---

BobsV35B(at)aol.com
Guest

Posted: Mon Mar 01, 2010 11:03 am Post subject: Battery charging

Good Afternoon Dave and James,

  

 I am curious as to whether or not either of you run capacity checks on a  regular basis. Isn't that the way the FEDs like us to do it on certified flying  machines?

  

 Happy Skies,

  

 Old Bob

 AKA

 Bob Siegfried

 Downers Grove, Illinois

 LL22

 Piper PA-20-150

  

  In a message dated 3/1/2010 11:41:01 A.M. Central Standard Time,  skywagon(at)charter.net writes:

 [quote]   James,

   Curious why you change them out so often. 

   I'll assume they are fairly expensive batteries.     

   Do you use a "maintainer" on them on the parked    days...?  I use Concords and Gill.  These get maybe changed out in 5    years, but, they always have a maintainer attached during off flying    periods.  When I do change them out they are still functioning normally    but, like you, there is a period limit that one feels  comfortable.

   Dave

         

   [quote]     ---

BobsV35B(at)aol.com
Guest

Posted: Mon Mar 01, 2010 11:03 am Post subject: Battery charging

Good Afternoon Dave and James,

  

 I am curious as to whether or not either of you run capacity checks on a  regular basis. Isn't that the way the FEDs like us to do it on certified flying  machines?

  

 Happy Skies,

  

 Old Bob

 AKA

 Bob Siegfried

 Downers Grove, Illinois

 LL22

 Piper PA-20-150

  

  In a message dated 3/1/2010 11:41:01 A.M. Central Standard Time,  skywagon(at)charter.net writes:

  	  Quote: 	
		     James,

   Curious why you change them out so often. 

   I'll assume they are fairly expensive batteries.     

   Do you use a "maintainer" on them on the parked    days...?  I use Concords and Gill.  These get maybe changed out in 5    years, but, they always have a maintainer attached during off flying    periods.  When I do change them out they are still functioning normally    but, like you, there is a period limit that one feels  comfortable.

   Dave

	


  [quote][b]

jbr79r(at)yahoo.com
Guest

Posted: Mon Mar 01, 2010 1:03 pm Post subject: Battery charging

In the big scheme of things the battery is a small expense.  Especially the ones mentioned.  I do not do a capacity check only because it is not something I want to spend the time messing with.  I use the removed batteries for other applicatiions.

Jim

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77

From: "BobsV35B(at)aol.com" <BobsV35B(at)aol.com>

To: aeroelectric-list(at)matronics.com

Sent: Mon, March 1, 2010 11:22:02 AM

Subject: Re: Battery charging



      Good Afternoon Dave and James,

  

 I am curious as to whether or not either of you run capacity checks on a  regular basis. Isn't that the way the FEDs like us to do it on certified flying  machines?

  

 Happy Skies,

  

 Old Bob

 AKA

 Bob Siegfried

 Downers Grove, Illinois

 LL22

 Piper PA-20-150

  

  In a message dated 3/1/2010 11:41:01 A.M. Central Standard Time,  skywagon(at)charter.net writes:

  	  Quote: 	
		     James,

   Curious why you change them out so often. 

   I'll assume they are fairly expensive batteries.     

   Do you use a "maintainer" on them on the parked    days...?  I use Concords and Gill.  These get maybe changed out in 5    years, but, they always have a maintainer attached during off flying    periods.  When I do change them out they are still functioning normally    but, like you, there is a period limit that one feels  comfortable.

   Dave

	


  [quote]

[b]

skywagon

Joined: 11 Feb 2006
Posts: 184

Posted: Mon Mar 01, 2010 4:02 pm Post subject: Battery charging

Ol' Bob,

 Always enjoy your sage additions to this and other  aviation related lists.  

 To answer your question about "Capacity checking".   No, I do not do a formal check annually and probably should.  I use other  farmer style method....  Example, .. my 185 is fuel injected.  Every  once in a while, I don't hold my gum and tongue in the right place and miss  judge a hot start procedure especially in hot summer time.  Next, what  comes is probably the hardest application for a battery.  

  

 I can misjudge once or twice a year, and the procedure to  clear the vapor lock in the injection system, clearing the engine, priming  properly and then doing the restart can make an aged battery wheeze.  I use  that crude rule of thumb to determine if my battery is just not making the juice  anymore.  I don't recommend it, but, it works for me.  In 40 years of  flying, I have not been electron deficient.

  

 However, I am a big advocate of using the small Maintainer  type devices to keep the float voltage at par.

 David

   

 [quote]   ---

Speedy11(at)aol.com
Guest

Posted: Tue Mar 02, 2010 7:14 am Post subject: Battery charging

As is normal for this list, the gentleman's question was not answered and  he was instead admonished for using his time-proven techniques (which are not  opposed by the list moderator).

 I, too, am interested in an answer to James' question.

 Please allow me to rephrase James' question.

 Are you familiar with the M&B 20 AH CSB battery?

 Have you used it in an airplane?

 Is it suitable for use in an airplane?

 Would you recommend it?

 My technique is to change one of my two batteries each year.  It is my  technique and I'm not asking for comment on my technique.

 Any responses to the questions above regarding the M&B 20 AH CSB  battery?

 Stan Sutterfield

  

  	  Quote: 	
		  I have    been using Panasonic 17AH batteries (2) in my all electric airplane for

a    few years.   I usually change them out at annual time.  Someone    recommended

a 20 AH CSB from m&B battery company.  It is the same    size and a few dollars cheaper.

Any comment?

Jim



James    Robinson

Glasair lll  N79R

Spanish Fork UT   U77 	


 

  

  [quote][b]

BobsV35B(at)aol.com
Guest

Posted: Tue Mar 02, 2010 9:25 am Post subject: Battery charging

Thank You David and Jim,

  

 Just wondered as I have been using the capacity tests for the last five or  six years. I don't think it is imperative to do so, but it is interesting  <G>

  

 I find that some batteries do fail the test before I would have normally  replaced them. As Jim mentioned. I try to use those batteries in a garden  tractor or similar non critical application.

  

 Happy Skies,

  

 Old Bob

  

  In a message dated 3/1/2010 6:04:31 P.M. Central Standard Time,  skywagon(at)charter.net writes:

 [quote]   Ol' Bob,

   Always enjoy your sage additions to this and other    aviation related lists.  

   To answer your question about "Capacity checking".     No, I do not do a formal check annually and probably should.  I use other    farmer style method....  Example, .. my 185 is fuel injected.  Every    once in a while, I don't hold my gum and tongue in the right place and miss    judge a hot start procedure especially in hot summer time.  Next, what    comes is probably the hardest application for a battery.  

    

   I can misjudge once or twice a year, and the procedure    to clear the vapor lock in the injection system, clearing the engine, priming    properly and then doing the restart can make an aged battery wheeze.  I    use that crude rule of thumb to determine if my battery is just not making the    juice anymore.  I don't recommend it, but, it works for me.  In 40    years of flying, I have not been electron deficient.

    

   However, I am a big advocate of using the small    Maintainer type devices to keep the float voltage at par.

   David

         

   [quote]     ---

rampil

Joined: 04 May 2007
Posts: 870

Posted: Tue Mar 02, 2010 3:03 pm Post subject: Re: Battery charging

Hey Stan,



Possibly the reason no answer was given was because M&B sells lots

of different batteries, but one of us who have to expend some effort to

figure out what kind of battery it is.



I did so, just because of all the chatter.

It is not a M&B battery, it is a CSB sealed Lead Acid battery

Does not say gel vs immobilized in the little ad.



Its probably ok but I have no experience with the CSB brand,

so you will be a test pilot!  After you use it a year let us know

what you found. Half price off an Odessey is not bad unless there is

a reason for the cheapness.



As for swapping out batteries every year: what a waste of money!

Driven by FUD, as the IBMers used to say: Fear, Uncertainty, and Doubt.

If you learn a bit about batteries, then maybe you can still use

premium quality Pana batteries and only swap them every other year!

_________________
Ira N224XS

jdubner(at)yahoo.com
Guest

Posted: Tue Mar 02, 2010 4:43 pm Post subject: Battery charging

BobsV35B(at)aol.com wrote:



[snip]

 	  Quote: 	
		   I find that some batteries do fail the test before I would have normally  

 replaced them. As Jim mentioned. I try to use those batteries in a garden  

 tractor or similar non critical application.


	


Me too, Old Bob <g>.  (Image of my drill with an external 35AH battery 

attached).  Seriously, this is a cost-effective substitute for those 

expensive replacement NiCad battery packs.  I just can't bear to throw 

away even a Harbor Freight $20 drill motor and it very useful at times.



The fine print: yes, this is a 12V battery and a 9.6V drill fed with 

some 18AWG power cord I had lying around.  The drill motor likes it just 

fine.  The thing should be fused but I consider the entire power cord to 

be a "fusible link".



-- 

Joe

Independence, OR

http://www.mail2600.com/position

http://www.mail2600.com/cgi-bin/webcam.cgi

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flylists(at)dbarrett.net
Guest

Posted: Tue Mar 02, 2010 6:02 pm Post subject: Battery charging

This thread piqued my curiosity, so I did a little research. The Panasonic & CSB batteries have similar specs apart from the 17/20 AH rating curve. Their operating range has a lower limit of -15 C (5 F), and an internal resistance of 12-13 mOhms. Internal resistance and temperature range will have a large impact on cold-weather starting. The CSB is limited to a max of 230 A for 5 sec. The Panasonic specs do not provide this information, but I suspect it is similar to CSB due to the internal resistance.  

   

At the other end of the battery spectrum is the Osyssey 680. It has a -40 C (-40 F) lower temperature limit, and 7.5 mOhm internal resistance. They claim a 680 A discharge rate for 5 sec. and 400 A for 30 seconds. The longer time AH capacity is typical for a 16 AH battery. EnerSys (parent company) also produces the Genesis product line at the same plant as Odyssey in Warrensburg, Missouri. The Genesis G12V16EP happens to have the same case design/dimensions, terminals, and electrical specs as the Odyssey 680, but at a somewhat lower price. They may not be identical, but it’s hard to tell any difference. Aviation is on the Genesis application list, so this might be a good value. http://tnrbatteries.com/geg11.html Odyssey and Genesis batteries also have a two year replacement warranty rather than the typical one year.  

   

Spec sheets (note that Odyssey & Genesis have every detail):  

Panasonic: http://www.panasonic.com/industrial/includes/pdf/Panasonic_VRLA_LC-PD1217P.pdf  

CSB: http://www.csb-battery.com/upfiles/dow01242375277.pdf  

Odyssey: http://www.odysseybatteries.com/files/techbook.pdf  

Genesis: http://www.enersysreservepower.com/documents/US_GPL_SG_001_0303.pdf  

   

If you’re looking at the Panasonic and/or CSB batteries, there are plenty of other batteries with similar specs that are even lower cost. Among other things, I’d pay close attention to the terminal style. Make sure that vibration won’t weaken the terminal over time. Many of these batteries differ only by the label on top.   

   

If starting current isn’t an issue with you, the lower cost batteries may well be the best value.  If you don’t want to be stranded with a dead battery in a cold climate or after a failed hot start, cranking amps will be a large part of your decision process. YMMV  

   

David Barrett  

   

   

       

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Speedy11(at)aol.com

 Sent: Tuesday, March 02, 2010 10:11 AM

 To: aeroelectric-list(at)matronics.com

 Subject: Re: Battery charging   

  

  

       

As is normal for this list, the gentleman's question was not answered and he was instead admonished for using his time-proven techniques (which are not opposed by the list moderator).  

    

I, too, am interested in an answer to James' question.  

    

Please allow me to rephrase James' question.  

    

Are you familiar with the M&B 20 AH CSB battery?  

    

Have you used it in an airplane?  

    

Is it suitable for use in an airplane?  

    

Would you recommend it?  

    

My technique is to change one of my two batteries each year.  It is my technique and I'm not asking for comment on my technique.  

    

Any responses to the questions above regarding the M&B 20 AH CSB battery?  

    

Stan Sutterfield  

    

   

  [quote]  

I have been using Panasonic 17AH batteries (2) in my all electric airplane for

 a few years.   I usually change them out at annual time.  Someone recommended

 a 20 AH CSB from m&B battery company.  It is the same size and a few dollars cheaper.

 Any comment?

 Jim

 

 James Robinson

 Glasair lll  N79R

 Spanish Fork UT  U77  [b]

jbr79r(at)yahoo.com
Guest

Posted: Tue Mar 02, 2010 9:34 pm Post subject: Battery charging

Thank you David

This was the type info I was hoping for.  I have used the Panasonic for 4 years with no real problem, however I have dual electronic ignition and I am usually hangered so starts are very easy.  However,  it is always good to be informed and with alternatives.

Jim

 

James Robinson

Glasair lll  N79R

Spanish Fork UT  U77

From: David Barrett <flylists(at)dbarrett.net>

To: aeroelectric-list(at)matronics.com

Sent: Tue, March 2, 2010 6:39:46 PM

Subject: RE: AeroElectric-List: Re: Battery charging 



                

This thread piqued my curiosity, so I did a little research. The Panasonic & CSB batteries have similar specs apart from the 17/20 AH rating curve. Their operating range has a lower limit of -15 C (5 F), and an internal resistance of 12-13 mOhms. Internal resistance and temperature range will have a large impact on cold-weather starting. The CSB is limited to a max of 230 A for 5 sec. The Panasonic specs do not provide this information, but I suspect it is similar to CSB due to the internal resistance.   

     

At the other end of the battery spectrum is the Osyssey 680. It has a -40 C (-40 F) lower temperature limit, and 7.5 mOhm internal resistance. They claim a 680 A discharge rate for 5 sec. and 400 A for 30 seconds. The longer time AH capacity is typical for a 16 AH battery. EnerSys (parent company) also produces the Genesis product line at the same plant as Odyssey in Warrensburg, Missouri. The Genesis G12V16EP happens to have the same case design/dimensions, terminals, and electrical specs as the Odyssey 680, but at a somewhat lower price. They may not be identical, but itâ€™s hard to tell any difference. Aviation is on the Genesis application list, so this might be a good value. http://tnrbatteries.com/geg11.html Odyssey and Genesis batteries also have a two year replacement warranty rather than the typical one year.   

     

Spec sheets (note that Odyssey & Genesis have every detail):   

Panasonic: http://www.panasonic.com/industrial/includes/pdf/Panasonic_VRLA_LC-PD1217P.pdf   

CSB: http://www.csb-battery.com/upfiles/dow01242375277.pdf   

Odyssey: http://www.odysseybatteries.com/files/techbook.pdf   

Genesis: http://www.enersysreservepower.com/documents/US_GPL_SG_001_0303.pdf   

     

If youâ€™re looking at the Panasonic and/or CSB batteries, there are plenty of other batteries with similar specs that are even lower cost. Among other things, Iâ€™d pay close attention to the terminal style. Make sure that vibration wonâ€™t weaken the terminal over time. Many of these batteries differ only by the label on top.    

     

If starting current isnâ€™t an issue with you, the lower cost batteries may well be the best value.  If you donâ€™t want to be stranded with a dead battery in a cold climate or after a failed hot start, cranking amps will be a large part of your decision process. YMMV   

     

David Barrett   

     

     

         

From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Speedy11(at)aol.com

 Sent: Tuesday, March 02, 2010 10:11 AM

 To: aeroelectric-list(at)matronics.com

 Subject: Re: Battery charging    

  

  

         

As is normal for this list, the gentleman's question was not answered and he was instead admonished for using his time-proven techniques (which are not opposed by the list moderator).   

    

I, too, am interested in an answer to James' question.   

    

Please allow me to rephrase James' question.   

    

Are you familiar with the M&B 20 AH CSB battery?   

    

Have you used it in an airplane?   

    

Is it suitable for use in an airplane?   

    

Would you recommend it?   

    

My technique is to change one of my two batteries each year.  It is my technique and I'm not asking for comment on my technique.   

    

Any responses to the questions above regarding the M&B 20 AH CSB battery?   

    

Stan Sutterfield   

    

    

   	  Quote: 	
		    

I have been using Panasonic 17AH batteries (2) in my all electric airplane for

 a few years.   I usually change them out at annual time.  Someone recommended

 a 20 AH CSB from m&B battery company.  It is the same size and a few dollars cheaper.

 Any comment?

 Jim

 

 James Robinson

 Glasair lll  N79R

 Spanish Fork UT  U77   http========================

=======

nuckolls.bob(at)aeroelect
Guest

Posted: Tue Mar 02, 2010 9:46 pm Post subject: Battery charging

 	  Quote: 	
		  As for swapping out batteries every year: what a waste of money!

Driven by FUD, as the IBMers used to say: Fear, Uncertainty, and Doubt.

If you learn a bit about batteries, then maybe you can still use

premium quality Pana batteries and only swap them every other year!


	


    Those who choose to swap out every year should

    be doing so precisely because it is NOT a waste of

    $time$.



    Every new development program I participate in

    gets carefully studied to deduce cost-of-ownership.

    When it comes to battery maintenance, you

    have to decide what YOUR $time$ is worth to do

    the extra functions required to guarantee battery

    performance. If you're retired and have nothing

    better to do than go through the cap-check exercise

    periodically, then perhaps a premium battery and

    attendant maintenance costs are comfortable to

    contemplate.



    On the other hand, if you buy the least expensive

    battery you can find and simply swap them out

    with some logic . . . like new main battery every

    year and move main battery to the aux battery slot.

    Now for the cost of a new battery you've saved the

    $time$ and test equipment to do a cap check and your

    confidence level in battery performance is quite

    high.



    This isn't about fear, uncertainty and doubt.

    It's about having no doubts whatsoever based

    on an activity that satisfies design goals

    and makes economic sense. It doesn't apply to

    everyone. For the guy who flies day-vfr to

    go rubber-necking, shucks . . . he can run

    a battery 'til it croaks. Cost of ownership

    is very low. But if you've installed an e-bus

    because it offers some capabilities for extended

    alternator-out operations, there's a whole

    new set of variables and solutions to consider

    . . . which may or may not included a new

    battery every year.



    Bob . . .

Speedy11(at)aol.com
Guest

Posted: Wed Mar 03, 2010 6:58 am Post subject: Battery charging

Ira,

 Good points, all.

 If I'm going to ask an opinion of someone on the list, then I certainly  must provide accurate information - or expect no answer.

 I'm using Odessey and happy with it so far.  I have no intention of  changing at this time.  But, I was interested in the answer to the proposed  question.  I am always interested in a less expensive, but adequate  replacements for equipment.

 Perhaps changing a battery each year is a waste of money.  And I've  been called an old FUDdy before, but it is certainly not out of fear,  uncertainty, or doubt.

 I change a battery a year because:

 1. It is recommended by an expert in the field - Electric Bob

 2. My ignorance dictates that I listen to the experts

 3. It establishes a reasonable means to avoid failure

 4. It is not overly expensive

 5. The batteries are used in other equipment and not wasted

 6. The oldest battery at any moment in my RV is 2 years.

 7. I don't have to bother with capacity checks

 I also change my tires before they fail.  Anyone who wants the old  ones just let me know.

 I change my hoses before they fail.  Anybody want the old ones?

 I don't like being stranded in remote locations because I tried to stretch  the life of consumables such as batteries.

 Just call me an old fuddy.

 Ira, thanks for researching the correct info on the battery and providing  your opinion.  I appreciate it.

 It appears from your comment that you prefer Panasonic batteries.   Which model do you use?  Why do you believe that battery is better than an  Odessey?  Does it have more AH capacity?  Does it have faston tabs or  screw on terminals?

 Your suggestion of replacing a battery every two years seems like  a reasonable thing to do - especially if one charges the batteries to capacity  periodically.

 Regards,

 Stan Sutterfield

  

  	  Quote: 	
		  Possibly    the reason no answer was given was because M&B sells lots

of different    batteries, but one of us who have to expend some effort to

figure out what    kind of battery it is.



I did so, just because of all the chatter.

It    is not a M&B battery, it is a CSB sealed Lead Acid battery

Does not say    gel vs immobilized in the little ad.



Its probably ok but I have no    experience with the CSB brand,

so you will be a test pilot!  After you    use it a year let us know

what you found. Half price off an Odessey is not    bad unless there is

a reason for the cheapness.



As for swapping out    batteries every year: what a waste of money!

Driven by FUD, as the IBMers    used to say: Fear, Uncertainty, and Doubt.

If you learn a bit about    batteries, then maybe you can still use

premium quality Pana batteries and    only swap them every other year!

	


 

  

  [quote][b]

Speedy11(at)aol.com
Guest

Posted: Wed Mar 03, 2010 7:13 am Post subject: Battery charging

David,

 Thanks for your detailed and informative response.  Superb info and  analysis.

 Stan Sutterfield

 Do not archive

  

  	  Quote: 	
		  This    thread piqued my curiosity, so I did a little research. The Panasonic    &

CSB batteries have similar specs apart from the 17/20 AH rating    curve. Their

operating range has a lower limit of -15 C (5 F), and an    internal resistance

of 12-13 mOhms. Internal resistance and temperature    range will have a large

impact on cold-weather starting. The CSB is limited    to a max of 230 A for 5

sec. The Panasonic specs do not provide this    information, but I suspect it

is similar to CSB due to the internal    resistance.

At the other end of the battery spectrum is the Osyssey    680. It has a -40 C

(-40 F) lower temperature limit, and 7.5 mOhm internal    resistance. They

claim a 680 A discharge rate for 5 sec. and 400 A for 30    seconds. The longer

time AH capacity is typical for a 16 AH battery.    EnerSys (parent company)

also produces the Genesis product line at the same    plant as Odyssey in

Warrensburg, Missouri. The Genesis G12V16EP happens to    have the same case

design/dimensions, terminals, and electrical specs as    the Odyssey 680, but

at a somewhat lower price. They may not be identical,    but it's hard to tell

any difference. Aviation is on the Genesis    application list, so this might

be a good value.    http://tnrbatteries.com/geg11.html Odyssey and Genesis

batteries also have    a two year replacement warranty rather than the typical

one    year.

Spec sheets (note that Odyssey & Genesis have every    detail):



Panasonic:

http://www.panasonic.com/industrial/includes/pdf/Panasonic_VRLA_LC-PD1217P.p

df



CSB:    http://www.csb-battery.com/upfiles/dow01242375277.pdf



Odyssey:    http://www.odysseybatteries.com/files/techbook.pdf



Genesis:    http://www.enersysreservepower.com/documents/US_GPL_SG_001_0303.pdf

If    you're looking at the Panasonic and/or CSB batteries, there are plenty    of

other batteries with similar specs that are even lower cost. Among    other

things, I'd pay close attention to the terminal style. Make sure    that

vibration won't weaken the terminal over time. Many of these    batteries

differ only by the label on top. 

If starting current    isn't an issue with you, the lower cost batteries may

well be the best    value.  If you don't want to be stranded with a dead

battery in a cold    climate or after a failed hot start, cranking amps will be

a large part of    your decision process. YMMV

David  Barrett

	


 

  

  [quote][b]

rampil

Joined: 04 May 2007
Posts: 870

Posted: Wed Mar 03, 2010 8:01 am Post subject: Re: Battery charging

Hi Stan,



Actually I have always used the Odyssey 680 in my Europa.  I trust

Pana in terms of general quality, but the specs for the Odyssey are better

for me in the Northeast.



Just changing batteries annually because you don't choose to learn about

batteries (Not talking about anyone individually here) is a shame. Money

is tight all around and frequent changes ignores the real possibility of

infantile failure which is just as likely in the real world as premature failure

if the products are made in the far, far east.



Sometimes experts disagree.  This is Bob's group and I respect that.

I appreciate his public service in dealing with the underending series

of questions.  There are also other opinions formed on reasonably

solid foundations of knowledge and experience that may differ

however because some experts place different priorities on different

aspects of a project. Look for example on the scrap between Nuckolls

and Richter a few years ago.



I was once an E.E., I spent 8 years in school and grad school, I

try to keep up with the literature and I hand built my plane and panel.

Ergo, I have opinions and they are not always the same as Bob's.

Is is certainly not a dis at Bob when I think there are better places to

spend money than changing out batteries that should be fairly fresh.

(Of course some people know when they have intentionally abused a battery - that is a different story)

_________________
Ira N224XS

Speedy11(at)aol.com
Guest

Posted: Thu Mar 04, 2010 8:36 am Post subject: Battery charging

Ira,

 I agree on all points.

 It is a shame to waste money.  But, as Bob reasoned, one can either do  capacity checks or replace batteries before they reach their service life.   I choose to replace.  Laziness on my part, perhaps.  For me, it is the  better option.  On my VFR Pacer, I run the battery until it dies.  On  my electrically-dependent IFR RV, I change the batteries every year - although I  may switch to 2 year replacements.

 I also frequently disagree with Bob - not so much on electric issues, but  on philosophy.  I still respect and consider his opinions.

 It is also nice to have other experts, such as yourself, comment on  this forum.

 Regards,

 Stan Sutterfield

 Do not archive

  

  	  Quote: 	
		  Just    changing batteries annually because you don't choose to learn    about

batteries (Not talking about anyone individually here) is a shame.    Money

is tight all around and frequent changes ignores the real possibility    of

infantile failure which is just as likely in the real world as premature    failure

if the products are made in the far, far east.



Sometimes    experts disagree.  This is Bob's group and I respect that.

I    appreciate his public service in dealing with the underending series

of    questions.  There are also other opinions formed on reasonably

solid    foundations of knowledge and experience that may differ

however because    some experts place different priorities on different

aspects of a project.    Look for example on the scrap between Nuckolls

and Richter a few years    ago.



I was once an E.E., I spent 8 years in school and grad school,    I

try to keep up with the literature and I hand built my plane and    panel.

Ergo, I have opinions and they are not always the same as    Bob's.

Is is certainly not a dis at Bob when I think there are better    places to

spend money than changing out batteries that should be fairly    fresh. 	


 

  

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