🚀 go-pugleaf

On Aug 13, 9:04 am, "BillW50" <Bill...@aol.kom> wrote:
> Innews:2a7b07e8-c255-4920-864d-20e4badc6352@s15g2000yqs.googlegroups.com,
> star...@rock.com typed on Thu, 13 Aug 2009 06:22:15 -0700 (PDT):
>
>
>
>
>
> > Brand new Dell Inspiron 1545 laptop purchased last week. At this time
> > the system will be used as a desktop, running on AC power continously.
>
> > According tohttp://www.batteryuniversity.comand other sources,
> > leaving the battery in - while always running on AC power and never on
> > battery power - will shorten the life of the battery.
>
> > So the battery's been removed, and with a 40% charge on it, it's in a
> > ziplock bag and stored in the refrigerator.
>
> > The plan is to remove it from storage after some time, put it back in
> > the laptop, recharge it back up to 40%, and then store it in the
> > refrigerator again. This cycle will be repeated indefinitely.
>
> > My questions are:
>
> > 1. How long can the battery remain stored in the refrigerator before
> > it has to be recharged? One month? Two months?
>
> > 2. Should I be concerned about corrosion of the contacts or dust
> > buildup in an empty battery compartment?
>
> > Any help would be greatly appreciated. Thanks!
>
> You don't need to keep it in the refrigerator for one. I keep my dozen
> or so Li-Ion batteries in a drawer. While keeping the battery 40%
> charged figure is thrown around as being best, I use 80% to 90% range
> for storing and the batteries has lasted over 10 years this way.
>
> How often to recharge them? It depends on how much the internal
> resistance is. This varies from battery to battery. Typically most loses
> 1% to 2% per month. So every 3, 6, or even 12 months should be okay.
> Pushing them 3 years in storage is where I find is often the trip point.
> As the voltage of the cells are close to or has exceeded the minimum
> safe levels and maybe too far gone by then.
>
> Contacts? I never had a problem with corrosion with the battery
> contacts.
>
> --
> Bill
> Gateway MX6124 ('06 era) - Windows XP SP2- Hide quoted text -
>
> - Show quoted text -

Thanks for the responses.

My plan is based on this information that I've found:

http://laptopbatterynews.com/2009/04/15/how-can-you-maximize-your-laptops-battery-performance

Remove Battery when Using AC/DC Power Source
Laptop batteries are in constant charge and discharge state when you
have the AC/DC adapter plugged into the computer and using the
computer with the battery installed. Removing the battery while using
the AC/DC adapter will help prolong the life span of the battey since
most last 500-800 charging cycles or 18-24 months. These frequent
shallow charges do not allow all of the battery cells to properly
condition for optimum battery performance.

http://www.batteryuniversity.com/partone-19.htm

Keep batteries in a cool and dry storage area. Refrigeration is
recommended but freezers should be avoided. When refrigerated, the
battery should be placed in a plastic bag to protect against
condensation

Do not fully charge lithium and nickel-based batteries before storage.
Keep them partially charged and apply a full charge before use. Store
lithium-ion at about 40% state-of-charge (3.75-3.80V/cell open
terminal). Lead-acid batteries must be stored fully charged.