Samsung Galaxy Note 7 investigation finds two battery issues caused overheating


After months of investigations, Samsung today officially revealed the cause of last year’s Galaxy Note 7 fires.

Samsung explains that there were two batteries used in the Galaxy Note 7, and that each one had its own defect. The first battery had a design flaw in its upper right corner that could cause electrodes to bend. This could cause the separation between the positive and negative tabs to break down, which could then cause the battery to short circuit.

The second battery suffered from a manufacturing issue. Specifically, Samsung says that it had a welding defect that could cause the battery to short circuit and overheat.

During its investigation, Samsung had 700 people testing 200,000 Note 7 phones as well as 30,000 batteries. Samsung tested many different features of the Note 7 in an attempt to pin down the cause of these fires, including the fast charging, wireless charging, and iris scanner. Samsung also brought in three outside firms — UL, Exponent, and TUV Rheinland — to also test the Note 7 batteries. The results of these firms’ reports can be found here.

Now that it confirmed the cause of the Note 7 fires, Samsung is putting steps in place to ensure that it doesn’t repeat this whole fiasco. These preventative measures include an 8-Point Battery Safety Check and the formation of a Battery Safety Group that’s made up of external advisers and research experts.

While most consumers have moved on from the Galaxy Note 7, it’s good that Samsung has come clean with the results of its investigation into the Note 7 fires. Not only does it satisfy the curiosity of everyone that’d been following the Note 7 mess, but the company has vowed to take steps to prevent this from happening again. This whole Note 7 incident is likely to hang over Samsung for a while, though, so don’t be surprised if the company continues to hammer on its battery safety measures when it introduces its next flagship.


Via: Recode
Source: Samsung

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  • Battery

    Make the battery user removable!!!!!!!!

  • vinnyjr

    Agree, removable battery would be the easy fix.

  • Larry E

    So, both flaws were issues SOLELY contained within the battery unit. Something that could have been fixed by a $20 knockoff battery on Amazon had it been user removable.

    And, you made thousands of users go without phones while the stores denied the issue and eventually made them buy a new phone.

    Good job Samsung! Way to screw the customer and force them to buy a new phone every other year with non-removable batteries.

  • a d00d

    I’d put the “I’m Sorry” video from South Park link here, but even my informative links keep getting removed (along with the posts).

    If Samsung REALLY learned their lesson, they’d understand people WANT their removable batteries, and they NEED to be removable for safety reasons. However, the sad truth is that neither Samsung nor any other manufacturer (including Google and Apple) will learn that lesson. It’s why I really wanted to get the V20, but there were too many other deficiencies combined with my perfectly good Nexus 6 working fine and actually being 6 inches, which I’m one of the apparent few who like a screen that large.

    • Mike Simon

      Actually, most people, including me, don’t really WANT or NEED a removable battery.

    • Trevnerdio

      Idk, my removable battery has saved my butt many times…allows the energy from drops to throw out the battery rather than crack my glass.

  • B_Eng

    Removable battery +1

  • Guest

    Use of non-removable batteries primary objective is planned obsolescence.

    Try to open your eyes a little from time to time.

    • Guest

      How many have even blamed chargers for this, and repeated many time that it is not the battery.

      The problem is more than the non-removable batteries, it’s people.

    • ElitistGuestsMakeMeYawn

      Use of non-removable batteries primary objective is planned obsolescence. Or could be to slim down the phone. Or it could be to help enable it to be water proof

      Try not to be an elitist from time to time.

  • Cellphone Chris

    Now that the investigation in concluded, I wish I could still purchase a Note 7 with a newly designed battery that passes the 8-point checklist. Having owned the device, there were several features I enjoyed that were superior to the S7 Edge experience.

    • AM Gone

      Tru dat.

  • Cellphone Chris

    Any chance they bring the Note 7 back to market with a new battery since the device itself has been eliminated as the cause?

    • Deadeye37

      Highly unlikely since the Note 7 is now associated with exploding batteries. Hopefully the S 8 and Note 8 doesn’t suffer too much from that fiasco.

    • Paul

      Like Deadeye said, it’s not likely to happen as they’re shutting them down.

      However, I believe they learned the lesson and the Note 8 will be a great phone.