Lithium Ion Battery Care

[Ivan Avery Frey]

On 03/02/10 13:28, teddy mills wrote:
> LION batteries are like a relationship.
> They require some care and attention otherwise they refuse to work
>
> I have left LION batteries uncharged for long periods, and when I want
> to use them, the batteries do not charge. I understand there is a
> lower limit, and if the LION battery falls below that, the LION
> battery is essentially dead.
>
> I find if I leave LION batteries alone fully charged, they dont seem
> to mind that.
>
> I am getting the idea the LION batteries prefer to be in the 80/20
> range. Not less than 20% AND NOT MORE THAN 80%.
>
> I guess my question is: If a LION battery is to be left unused for a
> few weeks or months, what should be done topreserve them?
>
> Leave my MP3 devices in the freezer?
Lithium Ion batteries don't like to be fully discharged, they're happy
when you're charging them up all the time.

I have the original battery that came with my PowerBook G4 (2004). I
tend to keep it fully charged. When it's plugged in the battery will
slowly discharge. When the battery charge reaches 94% the charging
circuit activates until the battery is fully charged. At times (not too
often) the adapter just shuts itself off and then depending on when I
notice it the battery has gone through a deeper discharge. Unplugging
and replugging the adapter turns it back on.

I have a Sony Digital 8 camcorder that uses a LiON battery. The manual
says that if the battery is not being used, to fully charge and
discharge the battery once a year. And then I fully charge it. It has
even leaked but it still works, so I keep a careful eye on it.



--
The Toronto Linux Users Group.      Meetings: http://gtalug.org/
TLUG requests: Linux topics, No HTML, wrap text below 80 columns
How to UNSUBSCRIBE: http://gtalug.org/wiki/Mailing_lists