🚀 go-pugleaf

starved@rock.com wrote:
> 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 to http://www.batteryuniversity.com and 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?

According to the article in the above posted link, it states that a
Lithium-ion battery stored at 40% charge in a cool place will be able to
recover 98% of its capacity after 1 year.
If it is stored at 100% charge, it will be able to recover only 94% of its
capacity after 1 year.
If stored a 25C (around room temp, but much cooler than it would be in the
laptop):
40%   charge = 96% after 1 yr
100% charge = 80% after 1 yr
If stored in the laptop (around 45C+) it would probably lose over 40% of its
capacity after 1 yr or less; it would be at full charge most of the time it
was in the laptop.



> 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!
>
> - Dave

I think you are doing the right thing to prolong the laptop battery.
When you take it out of the fridge, leave it in the ziplock bag until it
warms up and don't charge it until it is around room temp and there is no
moisture on the battery or its contacts.
Putting a cold object in a warm moist room will cause a lot of condensation
to form on the cold object.
Buffalo