Samsung Reveals Extent of Note7 Battery Fire Investigation

Samsung held a press conference on Monday in which it revealed the results of its internal investigation into why some of its Galaxy Note7 handsets set on fire. Last week, leaked reports confirmed the battery was to blame, but Samsung took pains today to explain the thoroughness of its investigation, which involved over 700 engineers and data gathered from testing 200,000 phones and 30,000 Note7 batteries.

In addition to enlisting the help of two independent testing labs, the Korean company built a large-scale test facility to automate different charging and discharging scenarios, which was able to replicate the failures of consumer handsets. Absolutely everything was examined, said Samsung, from hardware and software design, to manufacturing and logistics.

galaxy_note7-samsung_test_facility

Samsung's Note7 test facility.

Samsung said that two separate flaws were to blame for some batteries setting on fire in both original and replacement phones. The original Note7 battery had a design flaw in the top-right corner that was liable to short-circuit, while the batteries in replacement units were prone to combustion because of a welding defect. Some handsets were also missing insulation tape. For those interested, the company also released an infographic explaining the findings in more detail.

Going forward, Samsung said it was introducing an 8-point Battery Safety Check that includes additional inspection and testing. The firm also said it was improving training for all battery handlers across its assembly and shipping chains. In addition, it explained that more space would be allowed around the batteries in its handsets to protect them from impact-related failures, and said it would take steps to improve its battery diagnostic and controller software.

“I [hope] this serves as an opportunity to improve safety of lithium-ion not only for Samsung but for the entire industry,” Samsung mobile head DJ Koh told Recode, adding that Samsung takes responsibility for all components of the phone, including batteries made by other Samsung subsidiaries and those bought from outside companies.

Samsung confirmed that the changes would arrive in the forthcoming Galaxy S8, but told reporters not to expect its mid-cycle phone to make its usual appearance at the Mobile World Congress, held annually in February. No timeframe was given for the launch of the S8, suggesting Samsung is being careful not to put itself under undue pressure for its comeback after last year's Note7 debacle, which was said to be a result of the company trying to beat Apple's iPhone 7 to market.

Top Rated Comments

Chicane-UK Avatar
55 months ago
Holy moly... that's a lot of phones on test! Have to admire Samsung for being so open and so thorough about this.
Score: 33 Votes (Like | Disagree)
steve23094 Avatar
55 months ago
It's good they are being pretty open about it. Not so good it happened in the first place. I wonder how many other manufacturers could have these problems?
Score: 29 Votes (Like | Disagree)
maflynn Avatar
55 months ago
I wonder if Apple would have been so open and transparent?
Doubtful - just looking at their secretive behavior.

I'm not a Galaxy fan, never owned one, but kudos to Samsung to doing the right thing, and pulling out all the stops. I think this a nice step in the right direction to rebuilding their reputation.
Score: 25 Votes (Like | Disagree)
Relentless Power Avatar
55 months ago
"The original Note7 battery had a design flaw in the top-right corner that was liable to short-circuit, while the batteries in replacement units were prone to combustion because of a welding defect. Some handsets were also missing insulation tape."

I think this article says it all. Samsung rushed the Note 7 and it's quality control suffered. Some of the devices for missing insulation tape is a tell tale sign this should have never happened and is unacceptable.

The biggest take away these other phone manufacturers can learn from Samsung's mistake, is to Put out a quality device, even if it means it's not going beat the other phone competitor first.
Score: 25 Votes (Like | Disagree)
kdarling Avatar
55 months ago
I think this article says it all. Samsung rushed the Note 7 and it's quality control suffered.
It doesn't mean that at all. Nobody tests phones for battery failures like this, certainly not on the scale that would've been necessary to find these relatively rare occurences ahead of time.

It only shows that mistakes happen. The key is how to address it. Samsung didn't act accordingly at first until the US government put a firmer note.

If you mean announcing a voluntary recall before the CPSC did, that's actually not unusual. Heck, Apple themselves have done the same thing before, but nobody made a big fuss over them doing it.

Holy moly... that's a lot of phones on test! Have to admire Samsung for being so open and so thorough about this.
That is definitely a lot of phones under test! Kudos for them building such a facility to figure things out.

I once helped design and build a rack to test the functionality of 100 touchscreen computers at a time, and we thought that was a lot :cool:

For comparison, remember this leaked photo of a casual iPhone 5C test rack at their factory, with just a few dozen production units under test at a time?



Attachment Image
Score: 21 Votes (Like | Disagree)
keysofanxiety Avatar
55 months ago
Holy moly... that's a lot of phones on test! Have to admire Samsung for being so open and so thorough about this.
I have to admire their balls to set up a facility like that. :D
Score: 20 Votes (Like | Disagree)

Top Stories

samsung experience 1

Samsung's 'iTest' Lets You Try a Galaxy Device on Your iPhone

Thursday April 8, 2021 12:42 pm PDT by
Samsung has launched "iTest," an interactive website experience that's designed to allow iPhone users to test out Android on a Galaxy device, or "sample the other side," as Samsung puts it. Subscribe to the MacRumors YouTube channel for more videos. The iTest website is being advertised in New Zealand, according to a MacRumors reader who came across the feature. Visiting the iTest website on...
sonny 2021 ipad mini pro dummies

Leaked Dummy Units Show iPad Mini 6 With Thick Bezels and Home Button, New iPad Pro Models

Thursday April 8, 2021 2:11 am PDT by
Rumors suggest Apple will release refreshed versions of the iPad mini and iPad Pro models in the first half of this year, potentially as soon as this month, and a new leak today has provided us with a possible preview of what to expect in terms of the devices' overall design and camera prospects. Tech leaker and Apple blogger Sonny Dickson this morning shared images on Twitter showing dummy ...
fake airpods 3

Counterfeit 'AirPods 3' Hit the Market Prior to Official Announcement

Friday April 9, 2021 2:45 am PDT by
Apple is expected to launch the third iteration of AirPods in the third quarter of this year. Rumors and reports suggest the new AirPods will feature an updated design more in line with the AirPods Pro, but lacking in "Pro" features such as active noise cancellation. Despite AirPods 3 not yet being officially announced by Apple, counterfeit products of the unreleased earbuds have already hit ...
iMessage Android featured

Apple's Rationale for Not Bringing iMessage to Android Revealed in Legal Documents

Friday April 9, 2021 2:22 am PDT by
It's no secret that Apple sees iMessage as a big enough selling point to keep the service exclusive to Apple devices, however new court filings submitted by Epic Games in its ongoing lawsuit with the company reveal just how Apple executives have rationalized their decision not to develop a version of iMessage for Android. Apple clearly recognizes the power that iMessage has to keep users...
nba tracking prompt orange

Two-Thirds of iPhone Users Expected to Block Ad Tracking

Friday April 9, 2021 7:19 am PDT by
As many as 68 percent of iPhone users are expected to deny advertisers permission to track them thanks to Apple's App Tracking Transparency feature, in what is beginning to look like a significant blow to the advertising industry (via AdWeek). With the launch of iOS 14.5, apps will have to receive explicit user permission before accessing an iPhone's advertising identifier or IDFA, which is...
iPhone 13 Battery Life Feature

DigiTimes: iPhone 13 Pro Models to Feature 120Hz ProMotion Refresh Rate and 15-20% Less Power Consumption

Friday April 9, 2021 12:52 am PDT by
The two premium "Pro" models of the upcoming iPhone 13 lineup will be equipped with a low-power LTPO display, enabling the iPhones to have a 120Hz refresh rate, according to industry sources cited by Taiwanese publication DigiTimes. According to today's paywalled report, Apple suppliers Samsung and LG Display are in the process of converting parts of their production capacity to produce LTPO ...
ehric

iPhone 12 Mini Missing From Top 5 Best Selling Smartphone List of January 2021

Friday April 9, 2021 4:58 am PDT by
According to market data compiled by Counterpoint Research, Apple's smallest iPhone since the 2016 iPhone SE, the iPhone 12 mini, struggled to obtain a spot in the top five list of best-selling smartphones in January of this year. According to the market data, the iPhone 12 mini came in eighth place for the best-selling smartphone worldwide in the first month of the year. However, the iPhone ...
Top Stories 56 Feature

Top Stories: 'Find My' Expansion, iPhone 13 Pro Mockup, Largest-Ever iMac?

Saturday April 10, 2021 6:00 am PDT by
Apple's AirTags may still be nowhere to be seen nearly two years after signs of them were first discovered, but Apple this week launched its Find My network accessory program that will let third-party devices integrate with the Find My app on Apple's platforms to make it easy to keep track of your items. This week also saw fresh rumors about the upcoming "iPhone 13" and new iMacs, while...
fortnite apple featured

Epic's Case Against Apple in Australia Might Be Over

Friday April 9, 2021 12:21 pm PDT by
Epic Games and Apple are involved in a highly public lawsuit in the United States, but Epic has also sued Apple in other countries, including Australia, in an attempt to boost its chances of getting a favorable ruling. Things aren't quite going Epic's way, however, as the justice overseeing the case today decided that he's going to let the two companies battle it out in the United States. ...
Apple TV Ray Light Teal Film

Apple Wants to Draw Subscribers to Apple TV+ With More Feature Films

Friday April 9, 2021 10:27 am PDT by
Apple is ramping up its efforts to produce feature films, according to a new report from The Information. Apple has a limited number of high profile films already, including "Palmer," "Cherry," and "Greyhound," and sees it as a way to draw more people into Apple TV+. Apple has been telling studio executives that it is aiming to do more than 10 to 12 original movies per year for Apple TV+,...