6 ms·

Rubber alone would require pressure pushing the battery against the housing to maintain the battery position during a drop. This pressure against the underside

Rubber alone would require pressure pushing the battery against the housing to maintain the battery position during a drop. This pressure against the underside of the display module would mess with the display. Adhesive is needed because there can’t be any pressure against the underside of the display module, and the battery can’t be allowed to move even a slight amount during drop impacts.

cubefox 2y ago
If this was true, phones with replaceable batteries would be impossible.
- londons_explore 2y ago
  You can still put the battery in a box, and make it true inside the box.
  - rangestransform 2y ago
    The box takes up internal volume that could be used for more battery
    - cubefox 2y ago
      In reality, replaceable batteries aren't glued inside some sort of box. Glue simply isn't necessary. It's probably just slightly easier to use a solution with glue instead of one without glue.
- mschuster91 2y ago
  > If this was true, phones with replaceable batteries would be impossible. They're thicker to account for a solid plastics barrier between the battery compartment and the display backside to protect the display from the user during battery replacement. Glueing the battery to the phone backplate allows the manufacturer to skip the .5mm of plastic.
  - al_borland 2y ago
    Would anyone care if their phone was .5mm thicker? I realize if this logic was applied to everything the phone could double in thickness, but for a consumable part like a battery, it seems worth the sacrifice to make the repair trivial for the average user armed with nothing but a small screw driver.
    - rangestransform 2y ago
      Because the volume it takes up could always just be used for more battery instead
    - mschuster91 2y ago
      > Would anyone care if their phone was .5mm thicker? People not, but marketing people do.
      - brookst 2y ago
        I don’t understand the mindset that marketing people somehow trick millions of users. Most of marketing is figuring out what people want and convincing them your product meets those needs. There isn’t really a marketing strategy of “nobody values this but we will fight to the death to get the product designed that way so we can spend a ton of money convincing consumers to want something they don’t”. Or, let me rephrase that, there is no sustainable marketing strategy like that. People do try (see: New Coke, Humane AI pin).
        cubefox 2y ago
        Phones with replaceable batteries use plastic, and people really hate plastic (they use "cheap plastic" as a synonym for "plastic"). So they rather buy a phone that is a little bit slimmer and has a glass back. (Manufacturers probably also like phones that have to be replaced in a few years due to battery age.)
        mschuster91 2y ago
        Marketing people love some metric they can use to differentiate from competition. A phone gets thinner, lighter and survives more fall height or water depth. A PC gets a faster CPU (anyone thinking back to the megahertz wars [1] or the gigahertz wars [2]?), a bigger SSD or more RAM. [1] https://collections.museumsvictoria.com.au/articles/1538 https://collections.museumsvictoria.com.au/articles/1538 [2] https://arstechnica.com/gadgets/2024/03/intel-revives-the-mhz-race-with-6-2-ghz-power-guzzling-core-i9-14900ks/ https://arstechnica.com/gadgets/2024/03/intel-revives-the-mh...
- brookst 2y ago
  Not impossible, just less durable. See also: sockets instead of soldered chips, connectors instead of soldered wires.
  - cubefox 2y ago
    Phones with replaceable batteries typically were more durable, not less. (Though that may have to do with using plastic cases that are more durable than glass.)
strunz 2y ago
Also batteries under pressure is a dangerous and bad idea

cubefox 2y ago

If this was true, phones with replaceable batteries would be impossible.

londons_explore 2y ago
You can still put the battery in a box, and make it true inside the box.
- rangestransform 2y ago
  The box takes up internal volume that could be used for more battery
  - cubefox 2y ago
    In reality, replaceable batteries aren't glued inside some sort of box. Glue simply isn't necessary. It's probably just slightly easier to use a solution with glue instead of one without glue.
mschuster91 2y ago
> If this was true, phones with replaceable batteries would be impossible. They're thicker to account for a solid plastics barrier between the battery compartment and the display backside to protect the display from the user during battery replacement. Glueing the battery to the phone backplate allows the manufacturer to skip the .5mm of plastic.
- al_borland 2y ago
  Would anyone care if their phone was .5mm thicker? I realize if this logic was applied to everything the phone could double in thickness, but for a consumable part like a battery, it seems worth the sacrifice to make the repair trivial for the average user armed with nothing but a small screw driver.
  - rangestransform 2y ago
    Because the volume it takes up could always just be used for more battery instead
  - mschuster91 2y ago
    > Would anyone care if their phone was .5mm thicker? People not, but marketing people do.
    - brookst 2y ago
      I don’t understand the mindset that marketing people somehow trick millions of users. Most of marketing is figuring out what people want and convincing them your product meets those needs. There isn’t really a marketing strategy of “nobody values this but we will fight to the death to get the product designed that way so we can spend a ton of money convincing consumers to want something they don’t”. Or, let me rephrase that, there is no sustainable marketing strategy like that. People do try (see: New Coke, Humane AI pin).
      - cubefox 2y ago
        Phones with replaceable batteries use plastic, and people really hate plastic (they use "cheap plastic" as a synonym for "plastic"). So they rather buy a phone that is a little bit slimmer and has a glass back. (Manufacturers probably also like phones that have to be replaced in a few years due to battery age.)
      - mschuster91 2y ago
        Marketing people love some metric they can use to differentiate from competition. A phone gets thinner, lighter and survives more fall height or water depth. A PC gets a faster CPU (anyone thinking back to the megahertz wars [1] or the gigahertz wars [2]?), a bigger SSD or more RAM. [1] https://collections.museumsvictoria.com.au/articles/1538 https://collections.museumsvictoria.com.au/articles/1538 [2] https://arstechnica.com/gadgets/2024/03/intel-revives-the-mhz-race-with-6-2-ghz-power-guzzling-core-i9-14900ks/ https://arstechnica.com/gadgets/2024/03/intel-revives-the-mh...
brookst 2y ago
Not impossible, just less durable. See also: sockets instead of soldered chips, connectors instead of soldered wires.
- cubefox 2y ago
  Phones with replaceable batteries typically were more durable, not less. (Though that may have to do with using plastic cases that are more durable than glass.)

strunz 2y ago

Also batteries under pressure is a dangerous and bad idea