The battery lasts more than an hour, but, the power meter will show
critical level within 10 mins of running. I have tried the most common
recalibration technique - complete discharge and complete recharge -
many times, but there has been no change in this behaviour. I would
have let it pass, but the biggest problem is that once the power meter
indicates critical level (and the battery LED on the laptop begins to
flash), the system will not boot, unless plugged in. Once the system
boots, the power can be unplugged, and the system will continue
normally for close to an hour on the battery.
In
news:22bfb97d-dc34-4fa2-a50c-e001ccae9624@v25g2000yqk.googlegroups.com,
htnakirs typed on Sat, 31 Oct 2009 10:54:49 -0700 (PDT):
> I have a Compaq M2000 laptop, about 3 years old.
>
> The battery lasts more than an hour, but, the power meter will show
> critical level within 10 mins of running. I have tried the most common
> recalibration technique - complete discharge and complete recharge -
> many times, but there has been no change in this behaviour. I would
> have let it pass, but the biggest problem is that once the power meter
> indicates critical level (and the battery LED on the laptop begins to
> flash), the system will not boot, unless plugged in. Once the system
> boots, the power can be unplugged, and the system will continue
> normally for close to an hour on the battery.
>
> Any ideas?
1) Battery is 3 years old
2) Battery is left in the laptop 24/7
3) Laptop will only run 10 minutes on battery and shutdown
If the answer is yes to all in the above, regardless of the power meter
reading, your battery is shot. As batteries deteriorate overtime from
the heat of the laptop. And power calibration usually relies on the
voltage of the battery, not the internal resistance which deteriorates.
Laptops consume 20 or more watts of power from the battery. This is a
few amperes of current. And a lithium battery with high internal
resistance will only function for a short period of time or none at all.
The battery should function for much more of the capacity if the current
draw is lessened. Although not much you can do to lighten this heavy
current draw on a laptop.
--
Bill
Asus EEE PC 701G4 ~ 2GB RAM ~ 16GB-SDHC
Windows XP SP2
In news:Xns9CB5A2381E7BAnoonehomecom@74.209.131.13,
Larry typed on Sat, 31 Oct 2009 19:56:47 +0000:
> "BillW50" <BillW50@aol.kom> wrote in news:hchv5u$h68$1@news.eternal-
> september.org:
>
>> 2) Battery is left in the laptop 24/7
>>
>
> Horse****.
I have four batteries only two years old that were always left in the
laptop. I do my own research. And they were never used on battery power
and always on AC and charged. Want to buy them? They are worthless. Yet
the ones I left in a drawer are still doing just fine. Go figure, eh
Larry?
I am still doing research and the ones left in are losing capacity
overtime. Anybody can do this research. Just leave one battery in and
one battery out. And give it two years and then test the capacity of the
two batteries. And the evidence is clear as a bell.
--
Bill
Asus EEE PC 701G4 ~ 2GB RAM ~ 16GB-SDHC
Windows XP SP2
And, as I have said before, there was a thread on this subject on this
board a number of years ago, it went on for 6 months, thousands of posts
from hundreds of contributors. It was overwhelming, essentially
everyone had Bill's experience (and Bill and I don't agree on much !!):
Leave a battery in laptop that is always plugged in, and it destroys
the battery over 6 to 24 months. There may be some exceptions, but that
is the general rule. You can argue all you want that it shouldn't be
that way, and theoretically, you might even be right. But the
overwhelming evidence of laptop users is .... that this is the way that
it is. And reality beats theory every time.
BillW50 wrote:
> In news:Xns9CB5A2381E7BAnoonehomecom@74.209.131.13,
> Larry typed on Sat, 31 Oct 2009 19:56:47 +0000:
>> "BillW50" <BillW50@aol.kom> wrote in news:hchv5u$h68$1@news.eternal-
>> september.org:
>>
>>> 2) Battery is left in the laptop 24/7
>>>
>> Horse****.
>
> I have four batteries only two years old that were always left in the
> laptop. I do my own research. And they were never used on battery power
> and always on AC and charged. Want to buy them? They are worthless. Yet
> the ones I left in a drawer are still doing just fine. Go figure, eh
> Larry?
>
> I am still doing research and the ones left in are losing capacity
> overtime. Anybody can do this research. Just leave one battery in and
> one battery out. And give it two years and then test the capacity of the
> two batteries. And the evidence is clear as a bell.
>
> 1) Battery is 3 years old
>
> 2) Battery is left in the laptop 24/7
>
> 3) Laptop will only run 10 minutes on battery and shutdown
>
> If the answer is yes to all in the above, regardless of the power meter
> reading, your battery is shot. >
> --
> Bill
> Asus EEE PC 701G4 ~ 2GB RAM ~ 16GB-SDHC
> Windows XP SP2
The answer to the last question is NO, in my case. Eventhough the
meter shows critical level after 10 mins, the battery will support the
laptop for well over an hour - the LED will blink, but the laptop
continues till the battery dies and the laptop shuts down. So this is
not a question of the Li cell losing its capacity, rather the onboard
circuitry going bonkers.
But, from the response it seems there is no routine to recalibrate the
onboard circuitry. I guess I'll have to use it this way till the
battery loses capacity.
By the way, how frequently would you suggest that the battery should
be removed to prolong it's life?
In
news:57b9c901-f6e7-4fe3-907e-0a2e82ec54d3@v36g2000yqv.googlegroups.com,
htnakirs typed on Sun, 1 Nov 2009 05:31:15 -0800 (PST):
>> 1) Battery is 3 years old
>>
>> 2) Battery is left in the laptop 24/7
>>
>> 3) Laptop will only run 10 minutes on battery and shutdown
>>
>> If the answer is yes to all in the above, regardless of the power
>> meter reading, your battery is shot. >
>
> The answer to the last question is NO, in my case. Eventhough the
> meter shows critical level after 10 mins, the battery will support the
> laptop for well over an hour - the LED will blink, but the laptop
> continues till the battery dies and the laptop shuts down. So this is
> not a question of the Li cell losing its capacity, rather the onboard
> circuitry going bonkers.
>
> But, from the response it seems there is no routine to recalibrate the
> onboard circuitry. I guess I'll have to use it this way till the
> battery loses capacity.
Okay. Which battery program are you using? The windows one, or another
one? And I would be curious to know what something like BattStat v0.98
tells you.
> By the way, how frequently would you suggest that the battery should
> be removed to prolong it's life?
It is best to leave it out whenever you are not using it on battery
power or charging it. Although you have had 3 years out of it and that
is doing well if it was left in. As this suggests the battery doesn't
get too warm too deteriorate very much. Do you believe this is true?
--
Bill
Asus EEE PC 701G4 ~ 2GB RAM ~ 16GB-SDHC
Windows XP SP2
"Larry" <noone@home.com> wrote in message
news:Xns9CB5A2381E7BAnoonehomecom@74.209.131.13...
> "BillW50" <BillW50@aol.kom> wrote in news:hchv5u$h68$1@news.eternal-
> september.org:
>
>> 2) Battery is left in the laptop 24/7
>>
>
> Horse****.
>
"Barry Watzman" <WatzmanNOSPAM@neo.rr.com> wrote in message
news:hci8hu$506$1@news.eternal-september.org...
> And, as I have said before, there was a thread on this subject on this
> board a number of years ago, it went on for 6 months, thousands of posts
> from hundreds of contributors. It was overwhelming, essentially everyone
> had Bill's experience (and Bill and I don't agree on much !!): Leave a
> battery in laptop that is always plugged in, and it destroys the battery
> over 6 to 24 months. There may be some exceptions, but that is the
> general rule. You can argue all you want that it shouldn't be that way,
> and theoretically, you might even be right. But the overwhelming evidence
> of laptop users is .... that this is the way that it is. And reality
> beats theory every time.
>
Larry's track record on battery related postings is pretty abysmal. Best to
ignore him.
Battery recalibrate ideas 
Linear Mode
