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| "Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 03 02:55AM +0800 Source: http://www.bbc.com/news/technology-37255127 Samsung's decision to halt sales of the new Galaxy Note 7 because of reports of battery explosions is an extraordinary step for a tech giant to take. The firm said it had identified a battery issue but did not elaborate. But if a lithium-ion battery cell charges too quickly or a tiny manufacturing error slips through the net it can result in a short circuit - which can lead to fire. One expert urged the industry to find safer alternatives to lithium. "I think one should be concerned and push towards safer battery tech," said energy storage expert Professor Clare Grey from Cambridge University. "That should be an important focus on research and industry development. "While most manufacturing flaws will be picked up during initial testing, it's not an infallible process." However Prof Grey also said that people should not panic. "I'm standing at an airport - every single person would have to stop what they are doing if we took their batteries away from them," she said. "We all take risks in our lives - we drive cars sitting on top of flammable organic liquids. Other tech is coming along that is safer." Common causes There have only been 35 cases of the Galaxy Note 7 catching fire reported worldwide following 2.5 million sales, Samsung says. The lithium ion batteries used by Samsung are common across the tech industry - so what makes them hazardous? It's important to understand a little about how they work. Simply they contain a cathode, an anode and lithium. The cathode and anode are separated by an organic liquid called an electrolyte and a porous material called the separator. The lithium travels through the separator, within the liquid, between the two. Quick charge If the battery charges too fast, generating heat, lithium plates form around the anode which can create a short circuit. "Normally you would have a battery management system that controls the rate at which you charge," said Prof Grey. "Batteries are optimised so that you don't charge too fast - if you do that you will plate the lithium." This is also why battery charging can be a frustratingly slow experience, she added. Other faults that can cause a short circuit include contamination by tiny fragments of metal during the production process or minute holes in the sealing, which might not become apparent until the battery has been charged a few times as the materials expand and contract. "The manufacturing has got a lot more standardised than it was 10 to 15 years ago," said Prof Grey. However battery packs - combining battery cells to generate more power - can be problematic and this is increasingly common. Batteries containing 12 cells, for example, are readily available for laptops. "The more you put together, the higher the likelihood that some will fail," she added. "There are still flaws emerging but it's getting better. It is a challenge - with so many being produced, you just need one error." Signs to watch out for There can be symptoms indicating that a battery is about to fail, said support and repairs provider Geek Squad. "Sometimes, a battery will start to swell and bulge before it fails completely, as the internal cells rupture and break," it says on its website. "But the bulge doesn't always happen. If not, you might notice that your device is a little warmer than usual - but let's be honest, our phones get fairly warm during standard usage anyway." The firm suggests disposing of any batteries displaying these signs. -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa |
| avagadro7@gmail.com: Sep 02 05:53PM -0700 misuse |
| JJ <jj4public@vfemail.net>: Sep 03 08:02AM +0700 On Sat, 3 Sep 2016 02:55:01 +0800, Mr. Man-wai Chang wrote: [snip] Because of ignorance. What else? Any battery would explode if its power is drained too fast. |
| Black Iccy <Daedelus@whereamIinvalid.com>: Sep 03 11:31AM +1000 On Sat, 3 Sep 2016 02:55:01 +0800, "Mr. Man-wai Chang" >Source: http://www.bbc.com/news/technology-37255127 Given his post address, accord him some credit guys. He's learned how to cut-paste across 6 newsgroups. |
| "Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 03 04:37PM +0800 On 3/09/16 09:02, JJ wrote: > [snip] > Because of ignorance. What else? > Any battery would explode if its power is drained too fast. You expert all consumer buyers of rechargeable batteries to be experts? ;) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa |
| "Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 03 04:38PM +0800 > misuse A word applicable to all products and services? ;) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa |
| "Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 03 04:39PM +0800 On 3/09/16 09:31, Black Iccy wrote: > Given his post address, accord him some credit guys. > He's learned how to cut-paste across 6 newsgroups. I am merely sharing information in a public, open newsgroup, NOT trying to win fame, glory and honor. Find your Holy War in Vatican, not Usenet. :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa |
| T <T@invalid.invalid>: Sep 03 02:21AM -0700 Last time Dell Laptop Lithium batteries caught fire , it turned out to be metal shavings in the batteries: 3C (cheap, chinese crap) |
| JJ <jj4public@vfemail.net>: Sep 03 06:37PM +0700 On Sat, 3 Sep 2016 16:37:42 +0800, Mr. Man-wai Chang wrote: >> Because of ignorance. What else? >> Any battery would explode if its power is drained too fast. > You expert all consumer buyers of rechargeable batteries to be experts? ;) Who said it's the consumers' ignorance? Either way... Even if they're experts, the batteries will always explode if it's drained too fast. |
| "Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 03 10:25PM +0800 On 3/09/16 19:37, JJ wrote: > Who said it's the consumers' ignorance? > Either way... Even if they're experts, the batteries will always explode if > it's drained too fast. Maybe we should stop shrinking the size of rechargeable batteries... :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa |
| MJC <gravity@mjcoon.plus.com>: Sep 03 03:25PM +0100 In article <1e3a4wmte62zv$.1lqpwsifs5mal.dlg@40tude.net>, jj4public@vfemail.net says... > On Sat, 3 Sep 2016 16:37:42 +0800, Mr. Man-wai Chang wrote: > > On 3/09/16 09:02, JJ wrote: > > You expect all consumer buyers of rechargeable batteries to be experts? ;) > Who said it's the consumers' ignorance? > Either way... Even if they're experts, the batteries will always explode if > it's drained too fast. Even real engineers can apparently get it wrong: https://en.wikipedia.org/wiki/Boeing_787_Dreamliner_battery_problems Mike. |
| "Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 03 10:26PM +0800 On 3/09/16 22:25, MJC wrote: > Even real engineers can apparently get it wrong: > https://en.wikipedia.org/wiki/Boeing_787_Dreamliner_battery_problems Competence is a number, some bigger some smaller, while some are pretending! :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa |
| avagadro7@gmail.com: Sep 02 05:57PM -0700 we spoke of this at work today so at lunch we wired 100 together attached to a long probe. There was an elephant in the parking lot. The elephant was grounded and stuck with the probe. the elephant died instantly. medics were called. the elephant was resused using a reversed vacuum cleaner. the elephant wandered off n hired a lawyer. |
| "Mr. Man-wai Chang" <toylet.toylet@gmail.com>: Sep 03 04:42PM +0800 > medics were called. the elephant was resused using a reversed vacuum cleaner. I want this toy! :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_pubsvc/page_socsecu/sub_addressesa |
| "Ian Field" <gangprobing.alien@ntlworld.com>: Sep 02 06:50PM +0100 <mhooker32@gmail.com> wrote in message news:f91cb835-2f5e-4f5d-b8a2-e125545a9428@googlegroups.com... >> With some TV makes/models - it made it onto the stock fault list. > cap kit did the trick, nice image now. way in the corner of the board was > a leaker you couldnt see until it was pulled. thanks to all for your help On old gear - some engineers do a cap kit anyway before getting down to fault finding (if there is any). If the fault persists, there's a much greater level of confidence when you have to roll your sleeves up and hunt the elusive part. |
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