KR> battery charger

[Mark Langford]

Dave Arbogast wrote:

> Remember not to take your laptop above 10,000 msl as the hard drive
> needs air for the heads to float above the platter.

That's what they say, but I've flown mine at 12,000' on a regular basis, and 
even as high as 17,000.  I think what they may mean is that system 
robustness is degraded, for example it won't meet the same shock standards, 
but as smooth as it is at 17,000', mine still works fine.  Having said that, 
I have a plastic water bottle that I closed up tight at 12,000' or so, and 
once on the ground I'll bet it has about a third of the volume left in it.

On another matter, Harbor Freight sells a little 12V to 120V converter 
that's a little bigger than a soda can, and is good for several Amps. 
That's what I use, and it works fine except if I start the plane with it on 
and the laptop plugged in, it'll turn itself off out of self defense.  The 
cure is to always cycle the switch after starting the engine, and it hums 
away happily for the rest of the flight.  I also use it to charge my cell 
phone sometimes.

I'll see y'all on the other side...

Mark Langford
N56ML "at" hiwaay.net
website at http://www.N56ML.com
 

KR> battery charger

[Virgil N. Salisbury]

I think that many would like to know what desulpherizer

you use, Virg



George Bearden wrote:
> I work in an IT dept, and sometimes the old batteries get passed around. I
> think that many of them will have life left even if they don't perform. I
> think many of them need de-sulfating. I have a couple desulfator devices and
> have saved MANY times the price of them saving batteries. 
>
>
>   

KR> battery charger

[Dave Arbogast, CISSP]

Remember not to take your laptop above 10,000 msl as the hard drive 
needs air for the heads to float above the platter.
-dave

>  I have been
> thinking this arrangement would also give me a really cheap way to put a 110
> outlet on the panel or somewhere in the KR that I could plug in a laptop or
> other type equipment if I needed to and the weight is small ounces.
>
> Bobby Burington
> California KR2 Builder
>
>
>
>
>   
>
>
>
>
> ___
> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
> please see other KRnet info at http://www.krnet.org/info.html
>   

KR> battery charger

[George Bearden]

Since it is all made in China anyway, might as well get the 1 amp trickle
charger from harbor Freight for $6 on sale. Gets the job done just as well.

GeoB

KR> battery charger

[George Bearden]

I work in an IT dept, and sometimes the old batteries get passed around. I
think that many of them will have life left even if they don't perform. I
think many of them need de-sulfating. I have a couple desulfator devices and
have saved MANY times the price of them saving batteries. Friend brought
over a $279 Yellow Top, new, old-stock. Has been sitting fer a coupla years,
dead flat. It wouldn't take a charge at all no way. I put the desulfator on
there, powered by my 100 watts of solar on my 5th wheel. Doesn't cost me
nuthin. I left it on there a month, and returned it functioning like new. My
niece has a motorcycle shop. The mechanics never seem to have time to keep
alla the batteries charged, so they lose a lot. I went out to the recycle
bin, gathered up a coupla hunert pounds of them and restored them for her.
Dint cost me anything in electricity either.

-Original Message-
From: bobby burington [mailto:bobbycrea...@yahoo.com] 
Sent: Monday, February 09, 2009 12:28 PM
To: KRnet
Subject: Re: KR> battery charger

--- On Mon, 2/9/09, Oscar Zuniga <taildr...@hotmail.com> wrote:
> Question for you electronics types.  One of our office UPSs died and I 
> snagged it on its way out to the trash.



Hi Oscar,

Yes it will make a trickle charger for any size battery.

I have salvaged several of the UPS units you are talking about. Generally
its not the batteries that go bad and you can put thoes small batteries on a
regular 12 volt charger and recharge them. Normally for me its been the
circut board that goes bad from power surges or whatever. Sometimes you will
find a small fuse soldered somewhere on the power supply board or power
supply side of the main board. If you can solder in a new fuse you might be
in business. 

These are not only a trickle charger for batteries but the supply from the
batteries is a 12 volt to 110 converter for the duplex outlets. I took one
of the units apart, disconnected the wires from the batteries and then
connected it back up to the battery in my truck. Leaving the circut boards
and 110 outlets intact. Made a great 110 converter for my truck. I have been
thinking this arrangement would also give me a really cheap way to put a 110
outlet on the panel or somewhere in the KR that I could plug in a laptop or
other type equipment if I needed to and the weight is small ounces.

Bobby Burington
California KR2 Builder

KR> battery charger

[Jeff Scott]

One could certainly do that.  But why?  A quick look on line and I found wall 
wart type trickle chargers for as little as $16.  Then you have something that 
is sealed, electrically safe, and probably has a UL listing rather than using 
something in a way it wasn't intended to be used.

Take the UPS, replace the batteries in it, and use it to protect your new HD 
TV, home computer, or some other electronic toy??

-Jeff Scott
Los Alamos, NM


-- Oscar Zuniga  wrote:

Question for you electronics types.  One of our office UPSs died and I snagged 
it on its way out to the trash.  Opening it up, I see that it's quite easy to 
replace the two sealed 7Ah, 12V batteries and put it back online again.  
However, it occurred to me that it might also be just fine to use as a trickle 
charger for any 12V battery of this type, if I replace the internal battery 
leads with some longer ones with alligator or battery-type clamps.  Wouldn't 
this work OK?

These small desktop PC style UPSs get tossed out all the time and if they 
didn't die due to taking a surge on one or more of the MOVs, it would seem that 
they would make dandy chargers.  Comments?Oscar Zuniga
Air Camper NX41CC
San Antonio, TX
mailto: taildr...@hotmail.com
website at http://www.flysquirrel.net
___
Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
please see other KRnet info at http://www.krnet.org/info.html


Cheap Diet Help Tips. Click here.
http://thirdpartyoffers.juno.com/TGL2141/fc/PnY6rw3Eg7Ell3qg7kfXMxCooPCFV2QgT5VQAj4PI8rN4E7USd9OQ/

KR> battery charger

[bobby burington]

--- On Mon, 2/9/09, Oscar Zuniga  wrote:
> Question for you electronics types.  One of our office UPSs
> died and I snagged it on its way out to the trash. 



Hi Oscar,

Yes it will make a trickle charger for any size battery.

I have salvaged several of the UPS units you are talking about. Generally its 
not the batteries that go bad and you can put thoes small batteries on a 
regular 12 volt charger and recharge them. Normally for me its been the circut 
board that goes bad from power surges or whatever. Sometimes you will find a 
small fuse soldered somewhere on the power supply board or power supply side of 
the main board. If you can solder in a new fuse you might be in business. 

These are not only a trickle charger for batteries but the supply from the 
batteries is a 12 volt to 110 converter for the duplex outlets. I took one of 
the units apart, disconnected the wires from the batteries and then connected 
it back up to the battery in my truck. Leaving the circut boards and 110 
outlets intact. Made a great 110 converter for my truck. I have been thinking 
this arrangement would also give me a really cheap way to put a 110 outlet on 
the panel or somewhere in the KR that I could plug in a laptop or other type 
equipment if I needed to and the weight is small ounces.

Bobby Burington
California KR2 Builder

KR> battery charger

[Glenn Martin]

Oscar Zuniga wrote:
> Question for you electronics types.  One of our office UPSs died and I 
> snagged it on its way out to the trash.  Opening it up, I see that it's quite 
> easy to replace the two sealed 7Ah, 12V batteries and put it back online 
> again.  However, it occurred to me that it might also be just fine to use as 
> a trickle charger for any 12V battery of this type, if I replace the internal 
> battery leads with some longer ones with alligator or battery-type clamps.  
> Wouldn't this work OK?
>  
> These small desktop PC style UPSs get tossed out all the time and if they 
> didn't die due to taking a surge on one or more of the MOVs, it would seem 
> that they would make dandy chargers.  Comments?Oscar Zuniga
> Air Camper NX41CC
> San Antonio, TX
> mailto: taildr...@hotmail.com
> website at http://www.flysquirrel.net
> ___
> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp
> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net
> please see other KRnet info at http://www.krnet.org/info.html
>
>   
Generally, those will work for similar batteries. Smaller batteries 
would likely require the charge current be decreased, and larger ones, 
increased.  In the absence of any actual numbers, I  suspect those 
charge current ranges will overlap when the batteries are close in their 
ratings.

-- 
Glenn Martin
Owner
Martek Mississippi Electronic Repair
13238 Hudson-Krohn Rd
Biloxi, MS, 39532
rep...@martekmississippi.com

KR> battery charger

[Oscar Zuniga]

Question for you electronics types.  One of our office UPSs died and I snagged 
it on its way out to the trash.  Opening it up, I see that it's quite easy to 
replace the two sealed 7Ah, 12V batteries and put it back online again.  
However, it occurred to me that it might also be just fine to use as a trickle 
charger for any 12V battery of this type, if I replace the internal battery 
leads with some longer ones with alligator or battery-type clamps.  Wouldn't 
this work OK?

These small desktop PC style UPSs get tossed out all the time and if they 
didn't die due to taking a surge on one or more of the MOVs, it would seem that 
they would make dandy chargers.  Comments?Oscar Zuniga
Air Camper NX41CC
San Antonio, TX
mailto: taildr...@hotmail.com
website at http://www.flysquirrel.net