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Re: How does an app estimate charging current?

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On 12:22  16 Aug 2016, crankypuss wrote:

> On 08/15/2016 10:37 AM, David Taylor wrote:
>> On 15/08/2016 13:31, crankypuss wrote:
>> []
>>> Probably not as-such and software-readable, but the phone has
>>> no means of determining when the battery is fully charged
>>> other than measuring the current flow, so something's
>>> measuring it, whether or not that something is programmable.
>> []
>>
>> A phone can measure the battery voltage, and perhaps the
>> battery temperature to determine end-of-charge.  Many Li-ion
>> cells have these measuring facilities built-in, which is why
>> they have more than two terminals.
> 
> I'm fairly sure there are industry standards I'm unaware of that
> specify what information batteries provide.  On linux I've seen
> evidence that there are quite a few of these indicators, telling
> the company, model, capacity, and so forth.  But if the phone
> isn't charging, the first thing to do is determine whether the
> charger is at fault or the phone. Swapping chargers should tell
> that much, assuming access to a known-good charger.

I have an Android app which monitors the battery when it is charging 
but on my tablet the app says some chips are missing so it can only 
give approximate info.  Presumably other devices have this chip which 
reports on battery activities.

On my tablet, the app says it will give an approximate value for the 
charging current although I'm not sure how it's doing that.

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Thread

How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-15 02:13 +0000
  Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-15 06:31 -0600
    Re: How does an app estimate charging current? David Taylor <david-taylor@blueyonder.co.uk.invalid> - 2016-08-15 17:37 +0100
      Re: How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-16 05:13 +0000
        Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-16 05:28 -0600
          Re: How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-16 13:43 +0000
            Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-17 04:59 -0600
        Re: How does an app estimate charging current? David Taylor <david-taylor@blueyonder.co.uk.invalid> - 2016-08-16 17:07 +0100
        Re: How does an app estimate charging current? Nigel Wade <nmw@local.domain> - 2016-08-17 15:50 +0100
          Re: How does an app estimate charging current? Aardvarks <aardvarks@a.b.c.com> - 2016-08-17 17:12 +0000
      Re: How does an app estimate charging current? crankypuss <undisclosedUserid@gmail.com> - 2016-08-16 05:22 -0600
        Re: How does an app estimate charging current? pamela <invalid@nospam.com> - 2016-08-16 21:07 +0100

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