Digest for sci.electronics.repair@googlegroups.com - 9 updates in 4 topics

David <devotedobserver@thesky.net>: Jan 18 06:35AM -0500

I am in the process of using one of my old laptops for a specific task.
Of course, due to age, one of the issues I've come across is battery
life. Under any stress, the battery lasts maybe 20 min. If I do
nothing, it may go on for 45 min. Recently, I came across a few videos
where folks rebuilt their laptop battery packs and I'm wondering if it's
worth it for this old machine. Without too much effort, I managed to
disassemble the Lithium Ion pack and it is made up of 9 cells labelled
as Sony Energytec US17670 which, according to my research, are 3.6 V
cells and, as luck would have it, here is the same pack disassembled:
 
https://wiki.droids-corp.org/articles/m/a/g/Maggie/Electronics/Accu.html
 
Now the big question is: 1) Is it worth it to replace these cells? Some
quick searching is showing them being quite expensive even for "generic"
cells which I understand probably wouldn't last any longer than the time
I'm getting now. The next question would be 2) If worth it, what would
be a suggested source for obtaining the replacements? Finally (3) is
there any way simple way to increase power on time of these current
cells? I have read of people putting them in the freezer, etc, but I
don't think that's for this type of battery.
 
If all else fails, I'll just continue using the AC adapter.
 
Thanks.
N_Cook <diverse@tcp.co.uk>: Jan 18 02:02PM

On 18/01/2017 11:35, David wrote:
> don't think that's for this type of battery.
 
> If all else fails, I'll just continue using the AC adapter.
 
> Thanks.
 
Do you have to use an exact pack replacement for cosmetic purposes, or
can any old chunky external battery pack do the job?
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Jan 18 09:24AM -0500

On 01/18/2017 09:02 AM, N_Cook wrote:
 
>> Thanks.
 
> Do you have to use an exact pack replacement for cosmetic purposes, or
> can any old chunky external battery pack do the job?
 
Depending on how much your time is worth to you, there are all sorts of
outfits that refurb laptop batteries. Last time I used one it was about
$50 for a 9-cell Thinkpad pack, iirc.
 
Cheers
 
Phil Hobbs
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
 
160 North State Road #203
Briarcliff Manor NY 10510
 
hobbs at electrooptical dot net
http://electrooptical.net
"pfjw@aol.com" <pfjw@aol.com>: Jan 17 01:12PM -0800

On Tuesday, January 17, 2017 at 10:21:22 AM UTC-5, Mr. Man-wai Chang wrote:
 
> We all knew that every country and nation on this planet just wanna
> export their waste and sewage! :)
 
No, that waste and sewage is sent to where it is in demand. Or it would never get there.
 
This is pretty basic. And it is happening right out in the open with the full compliance of any and all relevant governmental bodies as may apply. Nothing covert, nothing dark, nothing smuggled, at least as it applies to what is under discussion.
 
Let me tell you a little story: Between 2002 and 2005, I managed a residential compound in Saudi Arabia. We had a school of 600, about 1,300 residents, 40,000 s.f. of professional offices, a major Consulate, two supermarkets, so on and so forth. Our daytime population was well over 2,000. We made our own water (deep wells), processed our own sewer on site and more. Because our base water was not brackish, or distilled, when we processed it through either of our two treatment plants, it was cleaner than the local municipal water (which was not bad at all). As we could not reuse it for drinking (high "YUK!" factor), we used it for irrigation. We had the greenest compound in the region, and the only full-grass soccer pitch in the province. But, what of the sludge? We chelated it for heavy metals (cheap and added phosphorus), and then contributed the sludge to local farmers (Look up Milorganite for a parallel process). The local farmers repaid us by setting up a Farmers' Market in the compound every weekend - at significant discounts to the local shops - even our own supermarkets. We also started a recycling program by polling local factories on what their feedstock needs might be - and then separating our solid waste accordingly. We saved money (literally by the ton), time and developed relationships that are still in place to this day. The rest of the Kingdom pretty much still follows the DiD (Dump-in-Desert) practice. It does not take much to recycle with care and attention.
 
But of a certainty, whining about it does no good and solves nothing, nor does reaching for "fairness".
 
Peter Wieck
Melrose Park, PA
Allodoxaphobia <knock_yourself_out@example.net>: Jan 17 11:28PM

On Tue, 17 Jan 2017 00:32:42 -0500, Michael Black wrote:
 
> You forgot the part where they implant the crystal in your hand, and when
> it changes color, it's Lastday, you visit the carousel and maybe win a
> chance at living longer, but the rest get terminated.
 
After which the remainders celebrate with a feast of Soylent Green.
 
Jonesy
etpm@whidbey.com: Jan 17 03:55PM -0800

On Tue, 17 Jan 2017 07:33:48 -0800 (PST), "pfjw@aol.com"
>> > another country. But other countries keep buying it.
 
>No, the US is not a signator to the Basel treaty. Nor, under the circumstances, will it be in the foreseeable future. What happens, in essence, is that US "Recyclers" haul the stuff to various locations (typically Ghana and China) and sell it more-or-less to the highest bidder dockside.
 
>This is a real problem which either Ghana or China could solve at the stroke of a pen (sign the treaty). But neither nation is interested as the downline c
The Chinese gonernment really doesn't care about most of the populace.
Today they seem to care most about making lots of money. The
regulation of polluting industries is not very well enforced. And the
regulations are pretty lax anyway. In some towns containers of e-waste
are off loaded from ships and floated or dragged or whatever onto the
beach. The waste is then sold to townsfolk who extract the goodies and
pretty much burn the rest. The Chinese culture is weird, to me at
least, the way they think about stealing intellectual property. They
seem to me to not care a whit about who made the first whatever
product, they will copy it and sell it at will. I guess they don't
consider it stealing. Right now China is the leading miner and
producer of rare earth metals. When the first rare earth magnets
started to appear here from China some were produced under license.
That didn't last long. So the market has been flooded with rare earth
materials from China to the point that the price has dropped
drastically. To prop up prices the Chinese government started to put
restrictions on how much ore could be mined and sold or processed and
then sold. This has not worked though because all those miners who are
no longer mining for some company are now working for themselves. They
are extracting ores from the same mines they used to be employed at.
Without permission. Sometimes they even use the mining equipment owned
by the mining company, including trucks used to move the ore from the
mine to the buyer. And the ore is now being sold on the black market
for much less than it was being sold for legitimately. Hmmm. China is
weird.
Eric
"Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Jan 18 04:30PM +0800

> Let me tell you a little story: Between 2002 and 2005, I managed a residential compound in Saudi Arabia. We had a school of 600, about 1,300 residents, 40,000 s.f. of professional offices, a major Consulate, two supermarkets, so on and so forth. Our daytime population was well over 2,000. We made our own water (deep wells), processed our own sewer on site and more. Because our base water was not brackish, or distilled, when we processed it through either of our two treatment plants, it was cleaner than the local municipal water (which was not bad at all). As we could not reuse it for drinking (high "YUK!" factor), we used it for irrigation. We had the greenest compound in the region, and the only full-grass soccer pitch in the province. But, what of the sludge? We chelated it for heavy metals (cheap and added phosphorus), and then contributed the sludge to local farmers (Look up Milorganite for a parallel process). The local farmers repaid us by setting up a Farmers' Market in the compound every weekend - at significant discounts to the local shops - even our own supermarkets. We also started a recycling program by polling local factories on what their feedstock needs might be - and then separating our solid waste accordingly. We saved money (literally by the ton), time and developed relationships that are still in place to this day. The rest of the Kingdom pretty much still follows the DiD (Dump-in-Desert) practice. It does not take much to recycle with care and attention.
 
Thank you sharing, Your Honor!
 
But your compound was not a computer factory. The recycling job is a lot
less complicated. My guess was mobile phones were imported rather than
manufactured in that little compound.
 
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Trevor Wilson <trevor@SPAMBLOCKrageaudio.com.au>: Jan 18 06:58AM +1100

> is a stained glass iron use able for rosin core solder on copper?
 
**No. It would be fucking hopeless on anything but very agricultural
work. OTOH, a good temperature controlled iron, with a large tip works a
treat on stained glass work. I used my ERSA iron for that purpose a few
years back. It was MUCH better than those huge, horrible irons stained
glass guys use.
 
--
Trevor Wilson
www.rageaudio.com.au
 
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"Benderthe.evilrobot" <Benderthe.evilrobot@virginmedia.com>: Jan 17 07:24PM

"mike" <ham789@netzero.net> wrote in message
news:o5jiq4$7oj$1@dont-email.me...
> ups battery.
 
> Another option is to hook a car headlight or some other heavy load
> directly to the UPS battery to see if it is good.
 
I've seen some pretty clapped out batteries light a H4 headlamp bulb with no
problem - its not a reliable test.
 
A UPS battery should turn over a typical motorcycle starter without any sign
of being sluggish.
 
Some UPS units play dead if there's high internal cell resistance.
 
Another point many overlook - Ah capacity falls as current draw rises.
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