Linked by Thom Holwerda on Mon 23rd Jan 2017 22:18 UTC
PDAs, Cellphones, Wireless

To find the cause of the Galaxy Note7 incidents, Samsung examined every aspect of the Galaxy Note7, including hardware, software and related processes over the past several months. Samsung's investigation, as well as the investigations completed by three independent industry organizations, concluded that the batteries were the cause of the Galaxy Note7 incidents. The causative factors are further explained in the infographic below.

The presentation last night was quite informative, and both Samsung and the three independent organisation got time to explain their findings in quite some detail. Sadly, they removed the VOD of the livestream from YouTube, so there's no way to rewatch it (edit: someone uploaded the VOD), but some of the slides can be found at the bottom of the linked article.

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Software!?
by PJBonoVox on Mon 23rd Jan 2017 23:36 UTC
PJBonoVox
Member since:
2006-08-14

I can't watch the presentation right now but do they explain exactly *what* in software they'd be looking for as a source of an exploding battery?!

Edited 2017-01-23 23:37 UTC

Reply Score: 1

RE: Software!?
by medior on Tue 24th Jan 2017 10:10 in reply to "Software!?"
medior Member since:
2016-02-20

A bug might be shorting out some cells.

Reply Parent Score: 0

RE: Software!?
by Alfman on Tue 24th Jan 2017 10:30 in reply to "Software!?"
Alfman Member since:
2011-01-28

PJBonoVox,

I can't watch the presentation right now but do they explain exactly *what* in software they'd be looking for as a source of an exploding battery?!


According to the presentation, the investigation revealed there were no flaws with the samsung software or electronics that contributed to this. It was a physical battery flaw.

As I understand it, unlike NiCad or NiMh which can be charged safety with basic circuits, lithium ion batteries are less stable and require more dedicated circuits and even firmware to charge & monitor them safety.

Here's a very detailed paper from blackhat where they did a teardown of a mac battery, electronics and all.

https://media.blackhat.com/bh-us-11/Miller/BH_US_11_Miller_Battery_F...


I'm having trouble finding it now, but I had read an article where someone was deliberately hacking the battery firmware in an attempt to get it to explode. (he failed btw).

Edited 2017-01-24 10:35 UTC

Reply Parent Score: 3

RE[2]: Software!?
by Brendan on Tue 24th Jan 2017 17:01 in reply to "RE: Software!?"
Brendan Member since:
2005-11-16

Hi,

Does the presentation explain how Samsung's QA testing was so inadequate (for a potentially explosive device) that they failed to realise they were shipping faulty batteries (regardless of who made them) long before any consumer received one?

- Brendan

Reply Parent Score: 1