Dell laptop batteries Getting closer to the truth+other tid bits

[Galvanized]

http://www.personaltechpipeline.com/...rssfeed_pl_ptp

I found this of interest while reading some of the links at Majorgeeks dot com

[linuxguru]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

Interesting - from the descriptions of the burn patterns and locations, I suspect there are multiple/combinations of issues here:

1) Poor quality Li-Ion batteries - probably from 2nd and 3rd-tier Chinese sources. I'm still running an old Latitude CPi on its original, 6+ year old Sony OEM Li-Ion battery, so it's possible that switching to lower-cost suppliers has taken its toll.

2) Higher power dissipation from the use of desktop P4 CPUs in notebooks - the Inspiron 1100 and 5100 come to mind. Intel and its Netburst marchitecture are the main culprits here.

3) Excessive stress on the VRM and other power-conversion/charging circuitry - the high failure rates on the Intersil power IC on the Inspiron 1150 is a case in point. Possible contact issues from the newer higher-current jack/socket could also be contributing to arcing/local overheating.

4) Not specifically identified, but bad capacitors could have a role as well.

[arneson]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

Two of my Dell1150 boards have badly discolored caps and the Intersil control chip has shut down, actually blew open on one.
I'm very familiar with this issue.
I have four Inspiron batteries next to me that are all fully charged, operate for about two hours and are of unknown age but OK.
Some think that blowing compressed air into the exhaust port gets the crud out.
In fact this only compacts the dust wad into the fan more, causing more overheating.
And don't get me started on the missing rubber feet, these must all be there for bottom clearance.

[willawake]

Re: Dell laptop batteries Getting closer to the truth+other tid bits



http://community.tomshardware.com/de...-freaking-blew

[Rainbow]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

https://www.dellbatteryprogram.com

[gonzo0815]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

He He somhow bad, to skimp on LIPO batteries, or exceed the safe discharge current. May be Dell has to notice, that in laptops high power apps it isn`t like an idiot can build a system with oem komponents, without knowing anything about those items.....
If that will occure to someone near tho such an unit or having the face close to it, i wouldn`t immagine what severe burnings that would cause.

[arneson]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

I just removed the batteries from the dells, they were getting warm. Ha haha ha.
Seems everybody had battery trouble, it's not easy to store that much amperage capacity in a little lite package.
At first no one knew how unstable lithium was so the original batteries were put in service for submarine use. You can imagine how big those banks were and all it takes is one cell shorting to cause a chain reaction.
My dad lost his leg to a bank of Lithium batteries, sealed in a steal pressure box, they went off like a cannon, blew the lab up, nobody knew they were there.

[willawake]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

considering these laptops and mobile phone batteries catching fire, it would be clever to choose a location away from any flammable stuff. like i had been charging my mobile overnight on top of a stack of VHS cassettes, probably not a good idea.

thinking about the Dells though, imagine your laptop catching fire like the one in the picture while you are on a plane

[arneson]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

Along with that burnt up picture there is a series of shots that show the actual burst, flame ball, and fire.
Group of guys are standing there about 10ft away and one ran for the fire extinguisher.
What's gonna happen when we have Hydrogen fuel cells?
I can't wait.

[Galvanized]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

Dell laptop battery recall, 4.1 million at last count.

http://www.msnbc.msn.com/id/14350403/

[willawake]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

hmm made by sony like the failing camera ccd sensors

[arneson]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

The U1223 is a 4300mAH 14.8v LI-ion pack.
It is presently not on the Dell list for recall and the four I have still work.
I haven't opened any for examination because I will be using these, but the warning printed on these says ATTENTION !
Do not expose to high temp. Do not disassemble or mistreat. Use only in the unit it's made for. and Risk of explosion, fire, and heat.
Made In Taiwan Then, UL,SA, CE, TUV certifications.
It seems they will only blow up in certain countrys?

[Shroomie]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

imagine your laptop catching fire like the one in the picture while you are on a plane

They won't prohibit all laptops yet, but they'll have a mandatory battery check.

[arneson]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

The whole thing with turn off your cell phone in flight is bogus.
But fire up that built in WIFI laptop and it tries to find an AdHoc network with MShome as the workgroup.
What does this signal do to the planes instrumentation?
Imagine the captain getting on saying, would the passenger in 21E please shut down the porn movie.

[willawake]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

Recall may cost Sony up to $430 million
http://news.com.com/Recall+may+cost+...nt&tag=nl.e703

[willawake]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

http://www.thisisleicestershire.co.u...folderPk=77465

[japlytic]

Re: Dell laptop batteries Getting closer to the truth+other tid bits

I am still trying to find a webpage and datasheets on Sony and Toshiba lithium ion cells (but not battery packs). Also, I am naturally inclined to use Sanyo lithium ion cells in my products (but Panasonic has larger capacity ones...).