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

(View all)
Avatar
49 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)
Avatar
49 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)
Avatar
49 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)
Avatar
49 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)
Avatar
49 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?



Score: 21 Votes (Like | Disagree)
Avatar
49 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

First iPhone 12 Mini Hands-On Video Surfaces [Update: Video Pulled]

Wednesday October 28, 2020 1:21 pm PDT by
Apple's iPhone 12 mini and the iPhone 12 Pro Max aren't set to be available until November 13, but a Romanian YouTuber got his hands on the iPhone 12 mini and showed it off today, offering a size comparison between the iPhone 12 and the 12 mini along with going over some of the device's features. The iPhone 12 mini is identical to the iPhone 12 in design and functionality, but it has a...

Apple References Unreleased 2020 16-Inch MacBook Pro in Boot Camp Update

Monday October 26, 2020 8:42 am PDT by
Last week, Apple released an update for Boot Camp, its utility for running Windows on a Mac. While this update would typically be unremarkable, several of our readers noticed that the release notes reference an unreleased 2020 model of the 16-inch MacBook Pro. While this could easily be a mistake, the 16-inch MacBook Pro is nearly a year old, so it is certainly a worthy candidate for a...

After Mocking Apple, Samsung May Remove Power Adapter From Galaxy S21 Box

Tuesday October 27, 2020 4:29 pm PDT by
Samsung's Galaxy S21, coming in 2021, may not include a power adapter or headphones in the box, according to reports from Korean media sites highlighted by SamMobile. Rumors earlier this year also said that Samsung was considering removing these accessories from future smartphone models, but that didn't stop Samsung from mocking Apple for selling the iPhone 12 models without a power adapter...

Report: Apple Silicon iMac Featuring Desktop Class 'A14T' Chip Coming First Half of 2021

Tuesday October 27, 2020 4:14 am PDT by
The first iMac powered by Apple Silicon is set to arrive in the first half of next year and will feature a desktop class "A14T" chip, according to Chinese-language newspaper The China Times. Codenamed "Mt. Jade," Apple's first custom-made desktop processor will be twinned with its first self-developed GPU, codenamed "Lifuka," both of which are being produced using TSMC's 5-nanometer process, ...

iPhone 12 Ceramic Shield Still 'Scratches at Level 6 With Deeper Grooves at Level 7' in Mohs Hardness Test

Wednesday October 28, 2020 7:10 am PDT by
iPhone 12 and iPhone 12 Pro models feature a new Ceramic Shield front cover that is "tougher than any smartphone glass," according to Apple, but the displays on the devices still have similar scratch resistance as previous iPhones based on a new test. Zack Nelson today shared his much-anticipated iPhone 12 Pro durability test on his YouTube channel JerryRigEverything, and based on the Mohs...

2020 iPad Air vs. iPad Pro: Hands-On Comparison

Tuesday October 27, 2020 3:03 pm PDT by
Apple announced the new 2020 fourth-generation iPad Air in September, but the new tablets just started shipping out to customers last Friday. We picked one up and thought we'd do a hands-on comparison with the iPad Pro, which was last updated in March, because both tablets are about as powerful and share many similarities. Subscribe to the MacRumors YouTube channel for more videos. Design and ...

MagSafe Charger Only Charges at Full 15W Speeds With Apple's 20W Power Adapter [Updated]

Monday October 26, 2020 3:38 pm PDT by
Alongside the iPhone 12 and 12 Pro models, Apple introduced a new MagSafe charger that attaches to the magnetic ring in the back of the devices, providing up to 15W of charging power, which is double the speed of the 7.5W Qi-based wireless charging maximum. Apple does not provide a power adapter with the $39 MagSafe charger, requiring users to supply their own USB-C compatible option. Apple...

Apple Files Mystery 'Personal Computer' With Placeholder 'B2002' Name in Bluetooth Product Database

Tuesday October 27, 2020 12:36 pm PDT by
Last week, a listing appeared in the Bluetooth product database for an Apple product with a placeholder name "B2002" and a model number of "TBD." MacRumors was alerted to the listing by health and fitness tech website MyHealthyApple. The product is filed under the "personal computer" category, which Apple has used for previous Mac and iPad listings in the database, so it is hard to pinpoint...

Apple Releases First macOS Big Sur 11.0.1 Beta to Developers [Update: Public Beta Available]

Wednesday October 28, 2020 10:15 am PDT by
Apple today seeded a new macOS Big Sur 11.0.1 beta to developers for testing purposes, with the new beta replacing the existing macOS Big Sur 11 beta 10 update that was released two weeks ago. The macOS Big Sur beta can be downloaded through the Apple Developer Center and once the appropriate profile is installed, subsequent betas will be available through the Software Update mechanism in...

iPhone 12 Models Might Support Reverse Charging of Future Apple Accessories According to FCC Filing

Tuesday October 27, 2020 6:25 pm PDT by
iPhone 12 models could have an inactive wireless charging feature for accessories, according to an FCC filing discovered by VentureBeat's Jeremy Horwitz. In the filing, Apple said that 2020 iPhones support a wireless charging function that will seemingly be enabled for at least one future Apple accessory:In addition to being able to be charged by a desktop WPT charger (puck), 2020 iPhones...