General > General Technical Chat
What's the real reason that laptop batteries are made not-accessible?
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SilverSolder:

--- Quote from: tooki on December 09, 2021, 08:05:55 am ---One feature, one I consider genuinely useful, that digitally connected headphones (be it Bluetooth, Lightning, or USB-C), in a tightly controlled ecosystem like apple’s, is headphone volume safety. When using digitally-connected Apple-made headphones, iOS can carefully monitor the actual headphone output, optionally limiting to an actual volume output, and not just a “dumb” maximum setting that’s unaware of the sensitive of the headphones in use. With compatible headphones, you can view real-time output (see attached screenshot from my iPhone). You can optionally configure it to limit to a particular dB level, and again it’s based on actual content volume. So if you need to turn the volume way up for a quiet recording, you still can, and if you forget to turn it back down for a “hot” recording, it will protect your ears.

(Way better than the old EU volume limit, which has no way of knowing what headphones were in use, and so by law the limit was based on the included headphones, often leaving you with insufficient volume with headphones.)

What I don’t know is whether Apple has a mechanism to allow third-party Made for iPhone headphones with digital connections to work with this system. If they don’t, I hope they enable it eventually.

--- End quote ---


Back in the day, one of my friends had a little too much to drink at a music festival...  he fell asleep with his head more or less inside one of the big speakers at the event.  That cost him 30% reduced hearing in one ear... 

Moral of the story?  - you can legislate for seatbelts, volume limits, no tobacco, etc.,  but if people don't take care of themselves, some of them will come a gutsa!  :D
tooki:

--- Quote from: SilverSolder on December 09, 2021, 02:13:55 pm ---Back in the day, one of my friends had a little too much to drink at a music festival...  he fell asleep with his head more or less inside one of the big speakers at the event.  That cost him 30% reduced hearing in one ear... 

Moral of the story?  - you can legislate for seatbelts, volume limits, no tobacco, etc.,  but if people don't take care of themselves, some of them will come a gutsa!  :D

--- End quote ---
Oh jeez, that sucks for him!!! :(

Yeah, I never liked the EU volume limit, but I very much approve of the well-designed, opt-in features Apple puts in now.

What I actually don't mind is the volume limits Switzerland puts in place at concerts and clubs (the strictest limit in the world), which is an average of 100dB(A) over an hour. It's debatable whether it actually prevents hearing loss, but I simply find it more pleasant -- 100dB(A) is still louder than I actually care for, and I in no way prefer my music to be quiet! So every DJ booth here has to have a sound level meter, and they often use one with a big display that can be easily seen by staff and any interested patrons. (Police do perform spot checks, especially in places with reputations for not adhering to the law.)
Rick Law:

--- Quote from: SiliconWizard on December 07, 2021, 01:13:40 am ---Yeah. Batteries are held in place with this double sided stuff. Heck, most of the time, there's even a strip underneath that's supposed to make it easy to remove the double-sided tape and thus the battery. In practice, after a few months of use, with regular heating from the battery, the double-sided tape becomes almost impossible to remove this easily. So the strip is great for servicing batteries after just a short time of use - probably for phones still under warranty - but after 2 years or so, that becomes a lost cause and removing the battery almost always imply fighting with the adhesive and eventually butchering the battery, hoping you don't damage it enough for it to leak or something. Yes, done this a few times... :-DD

--- End quote ---

Just a few weeks ago, I replaced the battery on my Zenfone 2 (551ml, not the 2e) probably 10 years old by now (not sure of actual age since it was purchased use).  The glue strip that glues the battery holder was easy to pull out and still very flexible.  The double sided tape that held the battery to the battery holder was hardened and very difficult to remove.  Instead of a 1/2 day battery, now it is a 2 day one.  Difficult but not too bad.

On my new Samsung S9, battery lasts a day.  But looking at youtube for its battery removal, that looks like hell to remove.  It does still support SD card.

From a usability standpoint, I still prefer the Zenfone 2 (Andriod 6) over the Samsung S9.  The Zenfone is my internet device and Samsung is my backup (phone wise, I am using flip phone).  Speed isn't everything.
james_s:

--- Quote from: cortex_m0 on December 09, 2021, 12:58:00 pm ---Because people kept buying the phones, and Apple did not back-track, and its competitors followed their lead.

--- End quote ---

That's meaningless, it tells you absolutely nothing due to the fact that virtually everyone needs a phone, and everyone copies pretty much whatever Apple does. Of course people are still buying the phones, because they have no other real choice. In order to have any meaningful data Apple would have to offer two very similar phones, one with a headphone jack and one without, and then if the one without sold better you could say it was a sound business decision. Why would anyone buy a phone without a headphone jack if they had a choice? What real advantage does not having it bring? You don't have to use it if it's there.
james_s:

--- Quote from: tooki on December 09, 2021, 05:17:48 pm ---Yeah, I never liked the EU volume limit, but I very much approve of the well-designed, opt-in features Apple puts in now.

What I actually don't mind is the volume limits Switzerland puts in place at concerts and clubs (the strictest limit in the world), which is an average of 100dB(A) over an hour. It's debatable whether it actually prevents hearing loss, but I simply find it more pleasant -- 100dB(A) is still louder than I actually care for, and I in no way prefer my music to be quiet! So every DJ booth here has to have a sound level meter, and they often use one with a big display that can be easily seen by staff and any interested patrons. (Police do perform spot checks, especially in places with reputations for not adhering to the law.)

--- End quote ---

Yes I agree there. I have not been to a concert in years but in my younger days I went to a handful of them and every one of them was much too loud. I don't understand the point of making it so loud that it's just painful and you need to wear earplugs to even hear the music. If I just wanted auditory pain I could do it a lot more cheaply by sawing up sheetmetal on a table saw at home.
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