On Wed, Aug 5, 2009 at 9:53 AM, Blake Hudson<blake@xxxxxxxx> wrote:
> Actually, it's the 100% charge state that is bad for LiIon. But a
> charge/drain cycle will likely wear the battery out even faster - LiIon
> batteries wear model is based on usage time. A 90% charge is ideal for
> long term storage - or for someone who leaves the laptop plugged into AC
> power most of the time.
Yes, this is exactly what I've heard.. 100% charge state seems to
drastically reduce the lifetime of the battery. The problem is that my
laptop is *always* on, so is constantly running at 100% charge. It
appears that the problem is not a memory effect, but more to do with
heat. The times I have removed it from the mains the battery held out
for only about 10 minutes before dying.
I'm experimenting with removing the batteries completely, but ideally
would like to have the battery backup in case of a power outage. My
other option is to get a UPS and run without the laptop battery.
> As far as software controls, I'm not familiar - but one thing that works
> in any OS is to simply remove the battery when on AC power.
>
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