Given the ligher cheaper laptops sold today-- Running with the battery out
may not work on some laptops.
It may also impose a type of load that causes the laptop power supply to be
a bit overloaded, and get hotter than it should.
We had an old laptop that eventually bit the dust with a cooked internal
power supply due to running for extended periods of time without the Ni Cad
battery installed.

Ni Cads are usually more forgiving than the Li batteries, although the old
Ni Cads may operate at ~50% of rated capacity.

When you "crack open" a bad laptop battery, usually only one or two cells
are really bad.

"+Bob+" <nomailplease@example.com> wrote in message
news:6r297555ibc3lk0d15j5qdstce4jcr2si0@4ax.com...[color=blue]
> On Sat, 1 Aug 2009 11:00:27 +0200, "Huib"
> <anonymous@discussions.microsoft.com> wrote:
>[color=green]
>>Hi,
>>
>>To keep the battery for a longer life what is the best:
>>
>>1. using the mainpower : removing the battery and performing regularly a
>>decharging and recharging?
>>2. using the mainpower : keeping the battery into the PC and performing
>>regularly a decharging and recharging?
>>3. only working with the battery and of course performing the charging
>>when
>>needed?
>>
>>Regards
>>Huib[/color]
>
> For best battery life, leave it out of the laptop 40% charged and only
> charge it when you need to use it.
>
> Unfortunately for most of us, that's an inconvenient way to work and
> if there's a power failure you crash.[/color]