In another newsgroup someone stated that, when leaving the computer on the
230V. mains, there would be no battery consumption, as opposed to cutting
off from the mains.
I always switch off the distributing-plug for PC and all devices when I'm
done.

Does this have any effect on the battery?



--
regards,

|\ /|
| \/ |@rk
\../
\/os

Linea Recta wrote:
>
> In another newsgroup someone stated that, when leaving the computer on
> the 230V. mains, there would be no battery consumption, as opposed to
> cutting off from the mains.
> I always switch off the distributing-plug for PC and all devices when
> I'm done.
>
> Does this have any effect on the battery?
>
>
>



The bios battery is not rechargeable so it does not matter if the
machine is connected to the mains or not. Typical life is about 5 years

"philo" <(E-Mail Removed)> wrote in message
news:hive5i$k0n$(E-Mail Removed)...
> Linea Recta wrote:
>>
>> In another newsgroup someone stated that, when leaving the computer on
>> the 230V. mains, there would be no battery consumption, as opposed to
>> cutting off from the mains.
>> I always switch off the distributing-plug for PC and all devices when I'm
>> done.
>>
>> Does this have any effect on the battery?
>>
>>
>>
>
>
>
> The bios battery is not rechargeable so it does not matter if the machine
> is connected to the mains or not. Typical life is about 5 years

Actually, it does matter. If the PC is left plugged into a live circuit, the
battery is not in use; CMOS settings are saved by the voltage to the board.
You can turn your PC off but parts of the board are still hot. That's why it
is recommended to unplug the PC from the wall or UPS before adding or
removing new cards or RAM.
Even with that, though, the average life is still about 3-7 years (big
average, eh?)
--
SC Tom

SC Tom wrote:
>
>
> "philo" <(E-Mail Removed)> wrote in message
> news:hive5i$k0n$(E-Mail Removed)...
>> Linea Recta wrote:
>>>
>>> In another newsgroup someone stated that, when leaving the computer
>>> on the 230V. mains, there would be no battery consumption, as opposed
>>> to cutting off from the mains.
>>> I always switch off the distributing-plug for PC and all devices when
>>> I'm done.
>>>
>>> Does this have any effect on the battery?
>>>
>>>
>>>
>>
>>
>>
>> The bios battery is not rechargeable so it does not matter if the
>> machine is connected to the mains or not. Typical life is about 5 years
>
> Actually, it does matter. If the PC is left plugged into a live circuit,
> the battery is not in use; CMOS settings are saved by the voltage to the
> board. You can turn your PC off but parts of the board are still hot.
> That's why it is recommended to unplug the PC from the wall or UPS
> before adding or removing new cards or RAM.
> Even with that, though, the average life is still about 3-7 years (big
> average, eh?)

The power supply is split in two halves. The main rails are one half of the
design (and support "soft off", where the computer can turn off the power
for itself on the main rails). The standby source is the other half. The
standby source runs all the time, until the AC is interrupted. The standby
source doesn't require the fan on the power supply to be running, as it is
intended to be a relatively low power output circuit with not a lot
of waste heat.

230VAC ---- PSU ---- +3.3,+5,+12,-12 (rails used when computer running)
Box ---- +5VSB ---+ (+5VSB is the standby voltage)
|
| -->
+------Diode---+
|
+--------- CMOS RAM and RTC
--> |
CR2032 battery ------Diode---+

The diode scheme selects the path with the highest voltage. If you've done
something to interrupt +5VSB (switch off at the back of the computer, or
flip the switch on the power strip), then the CMOS RAM and RTC will run
from battery. And that shortens the life of the battery.

The CR2032 still has a finite shelf life, even if no current is being
drawn. But if you put the computer in storage, with the CR2032 battery
left in place, then expect the battery to last about 3 years. That is how
long mine lasted, on two different computers in storage.

(The above diagram has been simplified a bit, by removing details about
a regulator just after +5VSB. The CMOS doesn't actually run from 5V,
but gets a voltage a bit higher than the 3V from the battery. The
regulator just after +5VSB might be delivering 3.3V, and that causes it
to be the preferential current flow path through the diodes. One of the
diodes ends up reverse biased, which is how the diodes manage the source
of current in this scheme.)

There is a motherboard schematic here. PDF page 85, shows the regulator
that takes 5VSB and makes 3.3V from it. The upper left corner of PDF page 82,
shows the diodes selecting the battery or +5VSB derived source of power
for the CMOS. You don't need to download this, unless you're really
really curious :-)

http://www.intel.com/design/chipsets...ics/252812.htm

Paul

"Paul" <(E-Mail Removed)> wrote in message
news:hj02tf$gov$(E-Mail Removed)...
> SC Tom wrote:
>>
>>
>> "philo" <(E-Mail Removed)> wrote in message
>> news:hive5i$k0n$(E-Mail Removed)...
>>> Linea Recta wrote:
>>>>
>>>> In another newsgroup someone stated that, when leaving the computer on
>>>> the 230V. mains, there would be no battery consumption, as opposed to
>>>> cutting off from the mains.
>>>> I always switch off the distributing-plug for PC and all devices when
>>>> I'm done.
>>>>
>>>> Does this have any effect on the battery?
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> The bios battery is not rechargeable so it does not matter if the
>>> machine is connected to the mains or not. Typical life is about 5 years
>>
>> Actually, it does matter. If the PC is left plugged into a live circuit,
>> the battery is not in use; CMOS settings are saved by the voltage to the
>> board. You can turn your PC off but parts of the board are still hot.
>> That's why it is recommended to unplug the PC from the wall or UPS before
>> adding or removing new cards or RAM.
>> Even with that, though, the average life is still about 3-7 years (big
>> average, eh?)
>
> The power supply is split in two halves. The main rails are one half of
> the
> design (and support "soft off", where the computer can turn off the power
> for itself on the main rails). The standby source is the other half. The
> standby source runs all the time, until the AC is interrupted. The standby
> source doesn't require the fan on the power supply to be running, as it is
> intended to be a relatively low power output circuit with not a lot
> of waste heat.
>
> 230VAC ---- PSU ---- +3.3,+5,+12,-12 (rails used when computer
> running)
> Box ---- +5VSB ---+ (+5VSB is the standby voltage)
> |
> | -->
> +------Diode---+
> |
> +--------- CMOS RAM and
> RTC
> --> |
> CR2032 battery ------Diode---+
>
> The diode scheme selects the path with the highest voltage. If you've done
> something to interrupt +5VSB (switch off at the back of the computer, or
> flip the switch on the power strip), then the CMOS RAM and RTC will run
> from battery. And that shortens the life of the battery.
>
> The CR2032 still has a finite shelf life, even if no current is being
> drawn. But if you put the computer in storage, with the CR2032 battery
> left in place, then expect the battery to last about 3 years. That is how
> long mine lasted, on two different computers in storage.
>
> (The above diagram has been simplified a bit, by removing details about
> a regulator just after +5VSB. The CMOS doesn't actually run from 5V,
> but gets a voltage a bit higher than the 3V from the battery. The
> regulator just after +5VSB might be delivering 3.3V, and that causes it
> to be the preferential current flow path through the diodes. One of the
> diodes ends up reverse biased, which is how the diodes manage the source
> of current in this scheme.)
>
> There is a motherboard schematic here. PDF page 85, shows the regulator
> that takes 5VSB and makes 3.3V from it. The upper left corner of PDF page
> 82,
> shows the diodes selecting the battery or +5VSB derived source of power
> for the CMOS. You don't need to download this, unless you're really
> really curious :-)
>
> http://www.intel.com/design/chipsets...ics/252812.htm
>
> Paul

LOL!!! Isn't that what I said, except in fewer sentences?
Don't take me wrong, Paul. I love your posts. Do you have these canned
somewhere, or do you type them out for each post?
Most respectfully,
--
SC Tom

Linea Recta wrote:

> In another newsgroup someone stated that, when leaving the computer on the
> 230V. mains, there would be no battery consumption, as opposed to cutting
> off from the mains.
> I always switch off the distributing-plug for PC and all devices when I'm
> done.
>
> Does this have any effect on the battery?

There is less consumption, not zero consumption. Besides, even you know
when there is zero consumption that batteries still grow weak over time just
sitting on the shelf unused.

SC Tom wrote:
>
>>
>> 230VAC ---- PSU ---- +3.3,+5,+12,-12 (rails used when computer running)
>> Box ---- +5VSB ---+ (+5VSB is the standby voltage)
>> |
>> | -->
>> +------Diode---+
>> |
>> +--------- CMOS RAM
>> and RTC
>> --> |
>> CR2032 battery ------Diode---+
>>

> LOL!!! Isn't that what I said, except in fewer sentences?
> Don't take me wrong, Paul. I love your posts. Do you have these canned
> somewhere, or do you type them out for each post?
> Most respectfully,

Most people have a monolithic view of their computer, and the
above is to attempt to describe what is inside in more detail.

Paul

Paul wrote:
> SC Tom wrote:
>>
>>>
>>> 230VAC ---- PSU ---- +3.3,+5,+12,-12 (rails used when computer
>>> running) Box ---- +5VSB ---+ (+5VSB is the
>>> standby voltage) |
>>> | -->
>>> +------Diode---+
>>> |
>>> +--------- CMOS RAM
>>> and RTC
>>> --> |
>>> CR2032 battery ------Diode---+
>>>
>
>> LOL!!! Isn't that what I said, except in fewer sentences?
>> Don't take me wrong, Paul. I love your posts. Do you have these
>> canned somewhere, or do you type them out for each post?
>> Most respectfully,
>
> Most people have a monolithic view of their computer, and the
> above is to attempt to describe what is inside in more detail.
>
> Paul

And I for one appreciate the time you invest on these posts. I've been
helped by your knowledge a few times.
--
SC Tom

"VanguardLH" <(E-Mail Removed)> schreef in bericht
news:hj0f1n$nsb$(E-Mail Removed)...
> Linea Recta wrote:
>
>> In another newsgroup someone stated that, when leaving the computer on
>> the
>> 230V. mains, there would be no battery consumption, as opposed to cutting
>> off from the mains.
>> I always switch off the distributing-plug for PC and all devices when I'm
>> done.
>>
>> Does this have any effect on the battery?
>
> There is less consumption, not zero consumption. Besides, even you know
> when there is zero consumption that batteries still grow weak over time
> just
> sitting on the shelf unused.


I know batteries self discharge also when unused. But as I understood it
life is extended in any case by leaving the PC on the mains. I started doing
so a few days ago, and booting up is still going fine now...



--
regards,

|\ /|
| \/ |@rk
\../
\/os

On Jan 19, 11:31*am, "Linea Recta" <mccm....@abc.invalid> wrote:
> "VanguardLH" <V...@nguard.LH> schreef in berichtnews:hj0f1n$nsb$(E-Mail Removed)...
>
> > Linea Recta wrote:
>
> >> In another newsgroup someone stated that, when leaving the computer on
> >> the
> >> 230V. mains, there would be no battery consumption, as opposed to cutting
> >> off from the mains.
> >> I always switch off the distributing-plug for PC and all devices when I'm
> >> done.
>
> >> Does this have any effect on the battery?
>
> > There is less consumption, not zero consumption. *Besides, even you know
> > when there is zero consumption that batteries still grow weak over time
> > just
> > sitting on the shelf unused.
>
> I know batteries self discharge also when unused. But as I understood it
> life is extended in any case by leaving the PC on the mains. I started doing
> so a few days ago, and booting up is still going fine now...
>
> --
> regards,
>
> |\ */|
> | \/ |@rk
> *\../
> * \/os

The only reason why the battery life is "extended" is the fact the
battery is used ONLY to retain the CMOS settings whenever there is no
current / power flowing thorough the PC from the main.