Path: ...!Xl.tags.giganews.com!local-1.nntp.ord.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Thu, 02 May 2024 11:43:42 +0000 Date: Thu, 2 May 2024 07:43:42 -0400 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: is my phone ON or is it OFF? Content-Language: en-US Newsgroups: comp.mobile.android References: From: =?UTF-8?B?YmFk8J+SvXNlY3Rvcg==?= In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Message-ID: Lines: 66 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-ElA47K81ADumrVNZt+xUwU64VUnpM463sPsma20v3VLqVDsHW6/gTVWWR2kHn0v+4wVzoU9zr2NtEky!ahJGyRVQ3ilue9uRN8dD3pdWZ2hxKxDvifsr+2hbfknFHZo1Rzqn2D7fymv4WVBlfZN7Y4C6d0YH X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 3935 On 5/2/24 02:17, Carlos E.R. wrote: > On 2024-04-27 11:16, Theo wrote: >> Jörg Lorenz wrote: >>> On 25.04.24 15:55, Frank Slootweg wrote: >>>> Jeff Layman wrote: >>>> [...] >>>> >>>>> The charging circuitry is within the battery itself. It controls the >>>>> rate of charge and, in particular, monitors the temperature of the >>>>> cell(s). If it gets too high it will stop the charging. Note though, >>>>> that the connection from the phone's charger socket (lightning, >>>>> USB, or >>>>> whatever) goes through some of the phone's circuitry, so the phone >>>>> knows >>>>> the state of charge of its battery. That way its % charge can be >>>>> displayed on the phone's screen, and battery-usage apps can let you >>>>> know >>>>> what's being used and how long the phone might last before >>>>> recharging is >>>>> essential. >>>> >>>>    The fact that the phone is charging and how full its battery is, is >>>> also displayed/displayable when the phone is switched 'off'. >>>> >>>>    Ergo, the phone is never really off. It's either awake or sleeping >>>> during normal use or in cold standby when the user switched it 'off'. >>> >>> Bullshit! >>> The OS is not booted when the Android is turned off. >> >> AIUI it is, kind of.  When you plug in the charger with the phone off, >> the >> phone starts.  The bootloader then launches the Android kernel with >> the flag >> androidboot.mode=charger >> >> Instead of doing the full Android boot, that causes the kernel to >> launch a >> charger UI application that shows your battery percentage on the >> screen or >> an animation (which comes from files on your OS partition).  The >> charger app >> doesn't allow you to otherwise interact with the phone and other services >> like the radios aren't running, but the SoC is booted and running >> software. >> The SoC is also doing standard power management, ie the charging process >> here likely looks very similar to charging when the phone is turned on >> (because it is, in essence). >> >> The full OS services are not running, but the Android kernel and the >> charger >> app is. >> >> Theo >> (usual caveats: my understanding may be out of date, different vendors >> may >> do their own thing, etc) > > > Hum!  That's the best explanation I have seen so far. Thank you. It > explains things. Like your compuer, it's sleeping with one ear (and maybe eye) open.