How to store battery?

Archived from groups: comp.sys.laptops (More info?)

Hello everyone!

I'm wondering what is the best way to store the battery when i'm using my
laptop on AC power (which is most of the time anyways).

Do I keep it charged or discharged and should I use it from time to time?

Thanks for your answers!

--
Regards, Eddie

Archived from groups: comp.sys.laptops (More info?)

The consensus is to remove the battery from the laptop. All of the
battery mfgrs. seem to recommend that lithium batteries be stored at 40%
to 60% charge, although I've stored them at full charge with no obvious
ill effects. Sony recommends storage at full charge for lithium
camcorder batteries, and a refresh cycle (not below 25% to 30%) about
once every 90 days.


Eddie wrote:

> Hello everyone!
>
> I'm wondering what is the best way to store the battery when i'm using my
> laptop on AC power (which is most of the time anyways).
>
> Do I keep it charged or discharged and should I use it from time to time?
>
> Thanks for your answers!
>

Archived from groups: comp.sys.laptops (More info?)

Barry Watzman wrote:
> The consensus is to remove the battery from the laptop. All of the
> battery mfgrs. seem to recommend that lithium batteries be stored at 40%
> to 60% charge, although I've stored them at full charge with no obvious
> ill effects. Sony recommends storage at full charge for lithium
> camcorder batteries, and a refresh cycle (not below 25% to 30%) about
> once every 90 days.
>
>
> Eddie wrote:
>
>> Hello everyone!
>>
>> I'm wondering what is the best way to store the battery when i'm using my
>> laptop on AC power (which is most of the time anyways).
>>
>> Do I keep it charged or discharged and should I use it from time to time?
>>
>> Thanks for your answers!
>>

I saw some test data that suggested there's a BIG difference in storage
deterioriation between 40% and 100% initial charge at high temperatures.
By the time you get down to just above 0C, it doesn't seem to matter
what the initial charge.
mike

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Archived from groups: comp.sys.laptops (More info?)

You are lucky.

Yes, the battery makes a nice UPS. But a new one is often $200. You
can buy a real UPS for $30 or less.


Ian S wrote:
> Opinions are mixed on battery storage. I keep my batteries attached all the
> time and they're mostly on AC. Both Thinkpad batteries are original - 7
> y.o. 560X and a 4 y.o. T22 - and they both hold sufficient charge for my
> purposes - at least 45 minutes. A key advantage of keeping the battery in
> the laptop is protection of data in case of power loss. YMMV.
>
>

Archived from groups: comp.sys.laptops (More info?)

WatzmanNOSPAM@neo.rr.com wrote:
> I think we can all agree that for this purpose, whatever the initial
> charge, the storage will be at "room temperature".
>
That's pretty #$#%# presumptious of you!
Data indicates that storing in the fridge (maybe) lengthens storage life.
Mine are ALL stored in the fridge.

So, no, we don't ALL agree!!!

mike

>
> mike wrote:
>
>> Barry Watzman wrote:
>>
>>> The consensus is to remove the battery from the laptop. All of the
>>> battery mfgrs. seem to recommend that lithium batteries be stored at
>>> 40% to 60% charge, although I've stored them at full charge with no
>>> obvious ill effects. Sony recommends storage at full charge for
>>> lithium camcorder batteries, and a refresh cycle (not below 25% to
>>> 30%) about once every 90 days.
>>>
>>>
>>> Eddie wrote:
>>>
>>>> Hello everyone!
>>>>
>>>> I'm wondering what is the best way to store the battery when i'm
>>>> using my
>>>> laptop on AC power (which is most of the time anyways).
>>>>
>>>> Do I keep it charged or discharged and should I use it from time to
>>>> time?
>>>>
>>>> Thanks for your answers!
>>>>
>>
>> I saw some test data that suggested there's a BIG difference in storage
>> deterioriation between 40% and 100% initial charge at high temperatures.
>> By the time you get down to just above 0C, it doesn't seem to matter
>> what the initial charge.
>> mike
>>
>



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Archived from groups: comp.sys.laptops (More info?)

No arugment, the battery is there for a purpose. But that purpose isn't
to be a UPS when the laptop is NOT mobile and is plugged into the AC
power lines 24x7 at one single site. You can use it for that purpose,
but doing so can be awfully expensive.


Ian S wrote:

> "Barry Watzman" <WatzmanNOSPAM@neo.rr.com> wrote in message
> news:42BE1A3B.1000400@neo.rr.com...
>
>>You are lucky.
>>
>>Yes, the battery makes a nice UPS. But a new one is often $200. You
>>can buy a real UPS for $30 or less.
>
>
> That's true and I certainly have one for my desktop PC. However, for me,
> much of the utility of a laptop is the ability to take it with me whether
> it's to another room or to another country. Lugging around a UPS wherever I
> go is not really feasible or desirable.
>
>