A computer components & hardware forum. HardwareBanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » HardwareBanter forum » General Hardware & Peripherals » General
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

Basis of 3.7V & 4.2V mobile battery?



 
 
Thread Tools Display Modes
  #1  
Old May 5th 19, 04:49 PM posted to alt.comp.hardware
[email protected]
external usenet poster
 
Posts: 1
Default Basis of 3.7V & 4.2V mobile battery?

Since no reasonable series voltage combination satisfies
Nv=3,7; Mv=4,2
how are these strange voltages achieved, and why?

What semiconductor technology do modern mobiles use:
bipolar, CMOS ... or what?

Where are these topics documented?

TIA.

  #3  
Old May 5th 19, 08:54 PM posted to alt.comp.hardware
Paul[_28_]
external usenet poster
 
Posts: 1,019
Default Basis of 3.7V & 4.2V mobile battery?

wrote:
Since no reasonable series voltage combination satisfies
Nv=3,7; Mv=4,2
how are these strange voltages achieved, and why?

What semiconductor technology do modern mobiles use:
bipolar, CMOS ... or what?

Where are these topics documented?

TIA.


Keyword: electrochemistry

Sites: # Practical details of batteries
https://batteryuniversity.com/learn/...ased_batteries
# "Characteristics hexagon" for battery chemistries, why we use them
https://batteryuniversity.com/index....of_lithium_ion
# Details of charging
https://batteryuniversity.com/learn/..._ion_batteries

# whizzy chemistry
https://en.wikipedia.org/wiki/Lithium_battery

# list of battery types
https://en.wikipedia.org/wiki/List_of_battery_types

# good stable but half-capacity tech, yard lamps
https://en.wikipedia.org/wiki/Lithiu...sphate_battery

# LiCoO2 is mentioned here, a high capacity but not entirely stable cell.
# Since Cobalt is expensive, other materials are used to cut the cells.
# Probably no Wikipedia article tracks latest chem evolution for these.
# You would need some sort of science journal. Like maybe electrochemistry.
https://en.wikipedia.org/wiki/Compar..._battery_types

*******

Modern mobiles are mostly CMOS. Bipolar for RF amps and radio stuff.
You can do radios in CMOS, but bipolar lasts longer (stable characteristic).
Doing radios in CMOS is "abuse" (and this is not from direct engineering
knowledge, just from observing how long CMOS-only products last, which
is about three months before the RF power level drops).

BiCMOS was discontinued some time ago, but is a great technology
for the engineers who used it. You could drive a 50 ohm line with the stuff.

HBT will run at 100GHz, but is not practical for computing, nor
does Moores law apply. Features are on the order of 2 microns.

CMOS is cheap, which is why we use it. And human psychology is such,
they will optimize the hell out of it, just to make Moores law
continue to hold.

The documentation is, well... everywhere.

Paul
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Computer hands, with solid ON HD LED on a rare basis. Bob F Overclocking 2 August 1st 10 04:28 PM
Mobile Printers and mobile means mobile Martin Sylvester Printers 1 August 28th 06 09:30 AM
Mobile Printers and mobile means mobile Bob Headrick Printers 0 August 28th 06 04:11 AM
Mobile Printers and mobile means mobile Bennett Price Printers 0 August 27th 06 09:16 PM
installing cat drivers on a per game basis via a local driver - can it be done? Sham B Ati Videocards 6 June 23rd 04 02:04 AM


All times are GMT +1. The time now is 02:23 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright 2004-2019 HardwareBanter.
The comments are property of their posters.