🚀 go-pugleaf

In 
news:2a7b07e8-c255-4920-864d-20e4badc6352@s15g2000yqs.googlegroups.com,
starved@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 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?
>
> 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