Electronics > Projects, Designs, and Technical Stuff

Samsung phones are charging batteries with an ugly pattern?

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Mechatrommer:

--- Quote from: jjman on February 03, 2019, 08:07:50 am ---
--- Quote from: Mechatrommer on February 02, 2019, 09:20:21 pm ---really? any reference to this claim?

--- End quote ---
There are graphs and data and attempt to analyze in this very topic ... would be such a joy if there was someone to read them :)

--- End quote ---
saw that. just because of that kind of shape, do you have right to say its a degradation attempt? is that a thesis or what? we need better proof, such as statistical data of batteries life vs charge/discharge cycle similar to what you have shown. do you have piles of dead batteries already from exhaustive test? if not, i can also say, xiamoi attempts to degrade charger, or toyota degrades their cars because they let them move, or God (or nature or whatever "something" (look at my signature) you like) deliberately degrade creation by letting them die old or mutilated born or whatever. there are always something to blame, without giving undisputable proofs and deeper level of thought ;)

timelessbeing:
Yeah. Calling it an inferior design and profit maximizing would be fair. Sabotage? You better have good proof, otherwise it's libel.

jjman:

--- Quote from: Mechatrommer on February 03, 2019, 09:32:53 am ---we need better proof, such as statistical data of batteries life vs charge/discharge cycle similar to what you have shown. do you have piles of dead batteries already from exhaustive test? if not, i can also say, xiamoi attempts to degrade charger, or toyota degrades their cars because they let them move, or God (or nature or whatever "something" (look at my signature) you like) deliberately degrade creation by letting them die old or mutilated born or whatever. there are always something to blame, without giving undisputable proofs and deeper level of thought ;)

--- End quote ---
If you want to contribute to the discussion please share how my interpretation of the data is wrong. E.g. how the current charging behavior is NOT leading to battery degradation. Do you have something to say?

p.s.
Here is why I think it is bad (sorry, requires reading: https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries)

jjman:

--- Quote from: timelessbeing on February 03, 2019, 09:37:24 am ---Yeah. Calling it an inferior design and profit maximizing would be fair. Sabotage? You better have good proof, otherwise it's libel.

--- End quote ---
Year, note taken, bad wording choice from my side (English is not my native language). I though that saying "it looks like" gives enough shakiness to the statement.
All what I wanted to say is "Looks like this promotes battery degradation" (if it is on purpose or not is a whole different discussion that has nothing to do with electronics).

The Soulman:

--- Quote from: jjman on February 03, 2019, 08:11:17 am ---
--- Quote from: amyk on February 03, 2019, 03:58:53 am ---You've discovered the difference between what the industry calls a "battery fed" design vs a "charger fed" design. Here's a good explanation of the basics:

https://www.analog.com/media/en/reference-design-documentation/design-notes/dn336f.pdf

--- End quote ---

Thank you! The DN was a very informative read :)
Now it makes way more sense. It looks like they use battery fed design for their flagship phones.

--- End quote ---

It is also possible that a higher peak current is needed than a usb charger could reliably deliver, perhaps for a tx burst.  :-//

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