[svlug] question - my laptop won't charge to 100% even though plugged in and using AC power

Jeff jeff.lists.nov.2006 at gmail.com
Sun May 3 17:10:22 PDT 2009


If you do not use the battery, you practically do no need it. I would  
remove the battery completely if you do not use it... In your case I  
would order a new battery and save it for when I travel or other times  
a battery is needed.

Sending from my phone, so ill keep it short.
Jeff

On May 3, 2009, at 2:01 PM, Darlene Wallach  
<freepalestin at dslextreme.com> wrote:

> On Sun, May 3, 2009 at 1:47 PM, Deyan Bektchiev  
> <svlug at bektchiev.net> wrote:
>> On Sun, May 3, 2009 at 1:01 PM, Darlene Wallach
>> <freepalestin at dslextreme.com> wrote:
>>> On Sun, May 3, 2009 at 1:52 AM, Deyan Bektchiev <dejanb at gmail.com>  
>>> wrote:
>>>> On Sat, May 2, 2009 at 1:05 AM, Darlene Wallach
>>>> <freepalestin at dslextreme.com> wrote:
>>>>> Chris,
>>>>>
>>>>> On Sat, May 2, 2009 at 12:55 AM, Chris Miller
>>>>> <lordsauronthegreat at gmail.com> wrote:
>>>>>> On Sat, May 2, 2009 at 12:42 AM, Darlene Wallach
>>>>>> <freepalestin at dslextreme.com> wrote:
>>>>>>> I always use my laptop plugged into AC power. The last few  
>>>>>>> days I've noticed
>>>>>>> the yellow light is blinking and will not turn green. When I  
>>>>>>> hover the mouse
>>>>>>> over the plug it shows the computer is charging. Does this  
>>>>>>> indicate I need a
>>>>>>> new power supply? The power supply gets warm - it used to get  
>>>>>>> hot. I just
>>>>>>> bought one last summer, July 2008, just before I left for  
>>>>>>> Gaza. Or does this
>>>>>>> indicate another problem?
>>>>>>>
>>>>>>> Thank you for any insight. Thank you for your attention.
>>>>>>
>>>>>> Lithium Ion batteries do loose their ability to hold a charge  
>>>>>> as time goes by.
>>>>>>
>>>>>> I have noticed that sometimes the battery's internal meter  
>>>>>> becomes
>>>>>> "confused" and fails to recognize that it's holding as much as  
>>>>>> it will
>>>>>> be able to hold in its degraded state.
>>>>
>>>> I had a ThinkPad battery that simply "died" and would not  
>>>> recharge at
>>>> all and was showing the exact same symptoms. The ThinkPad power
>>>> manager (unfortunately only available in Windows) showed that the
>>>> battery was bad and I called Lenovo to have it replaced under
>>>> warranty.
>>>>
>>>> Run "cat /proc/acpi/battery/BAT*/*" and look at the output to see  
>>>> if
>>>> the battery is really holding charge.
>>>>
>>>
>>> $ cat /proc/acpi/battery/BAT*/*
>>> alarm:                   365 mWh
>>> present:                 yes
>>> design capacity:         4400 mWh
>>> last full capacity:      3656 mWh
>>> battery technology:      non-rechargeable
>>> design voltage:          11100 mV
>>> design capacity warning: 365 mWh
>>> design capacity low:     182 mWh
>>> capacity granularity 1:  644 mWh
>>> capacity granularity 2:  8 mWh
>>> model number:            245XIX
>>> serial number:           0001
>>> battery type:            LiOn
>>> OEM info:                OEM
>>> present:                 yes
>>> capacity state:          ok
>>> charging state:          charging
>>> present rate:            unknown
>>> remaining capacity:      3605 mWh
>>> present voltage:         12516 mV
>>>
>> It looks like your battery capacity is degraded by 15-20% but is
>> should still be OK - I wouldn't worry much about the blinking light.
>>
>> If you want to try and restore some of the capacity, completely
>> discharge and charge the battery a couple of times. Discharge it  
>> until
>> the laptop would shut down or go to sleep and then charge to 100% (or
>> as much as it charges - you can use the ACPI information to monitor
>> the charging).
>>
>> --dejan
>>
>
> Thank you! I always use the power supply and never use the battery so
> I'll follow your advice and see what happens.
>
> Dalrene Wallach
>
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