🚀 go-pugleaf

In 
news:57f9a7b3-6cf5-4c2e-a393-7212187fdab6@g10g2000yqh.googlegroups.com,
starved@rock.com typed on Thu, 13 Aug 2009 07:19:47 -0700 (PDT):
> 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.

I agree with most everything. Although that 500-800 recharges are 
partial recharges IMHO. As if you run them down all of the time before 
recharging, the number is usually within 200 to 250 range. And that 18 
to 24 month figure is true if left in the laptop. Not true if left out 
of the laptop. As it will last 3 or more times longer than that.

The reason being is that the heat from the laptop (some are cooler than 
others) keeps the battery at higher temperatures. Which in the short run 
doesn't mean much. But day after day does degrade the battery which 
makes it useless in about 18 to 24 months for most laptops.

Another side effect of leaving the battery in all of the time on AC, is 
that most laptops will recharge the battery again once it drops down to 
96%. So the battery will be in this 96% to 100% charged state the whole 
time it is left in the laptop on AC. Also not so good for the battery.

And this last reason why not to leave it in the laptop which I am pretty 
much alone with this opinion. Is that laptop manufactures want to boost 
long battery life. And to do this, they charge the cells to 4.2v per 
cell. Great for longer running times. Bad for battery longevity. As 
stopping the charge when the battery hits 4.1v per cell makes it lasts 
so much longer IMHO.

So there you go and good luck!

-- 
Bill
Gateway MX6124 ('06 era) - Windows XP SP2