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Is it Dangerous to run a laptop without the battery?

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Unread 27-08-2007, 07:23 PM   #1
Justin
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Is it Dangerous to run a laptop without the battery?

Is it dangerous to run a laptop of AC power without the battery? i.e. won't
cause a fire.

I don't want to ruin the battery life since I don't need to use it much as I
am always near a power socket.
 
Unread 27-08-2007, 07:23 PM   #2
Pegasus \(MVP\)
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Posts: n/a
Re: Is it Dangerous to run a laptop without the battery?


"Justin" <Justin@discussions.microsoft.com> wrote in message
news:29EA41E0-B253-43A9-AC6F-889C28A2C726@microsoft.com...
> Is it dangerous to run a laptop of AC power without the battery? i.e.
> won't
> cause a fire.
>
> I don't want to ruin the battery life since I don't need to use it much as
> I
> am always near a power socket.


It's perfectly OK to run it without batteries. I've been doing
it for years. Unfortunately I cannot yet say conclusively that
this mode extends the life of the battery. The boys in a hardware
newsgroup might be able to tell you.


 
Unread 27-08-2007, 07:23 PM   #3
Pegasus \(MVP\)
Guest
 
Posts: n/a
Re: Is it Dangerous to run a laptop without the battery?


"Justin" <Justin@discussions.microsoft.com> wrote in message
news:29EA41E0-B253-43A9-AC6F-889C28A2C726@microsoft.com...
> Is it dangerous to run a laptop of AC power without the battery? i.e.
> won't
> cause a fire.
>
> I don't want to ruin the battery life since I don't need to use it much as
> I
> am always near a power socket.


It's perfectly OK to run it without batteries. I've been doing
it for years. Unfortunately I cannot yet say conclusively that
this mode extends the life of the battery. The boys in a hardware
newsgroup might be able to tell you.


 
Unread 27-08-2007, 07:24 PM   #4
Kenny
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Posts: n/a
Re: Is it Dangerous to run a laptop without the battery?

I have a fairly new Advent laptop and it won't run with the battery out!

--
Kenny Cargill




"Pegasus (MVP)" <I.can@fly.com> wrote in message
news:%23B8n78w3HHA.484@TK2MSFTNGP06.phx.gbl...
>
> "Justin" <Justin@discussions.microsoft.com> wrote in message
> news:29EA41E0-B253-43A9-AC6F-889C28A2C726@microsoft.com...
>> Is it dangerous to run a laptop of AC power without the battery? i.e.
>> won't
>> cause a fire.
>>
>> I don't want to ruin the battery life since I don't need to use it much
>> as I
>> am always near a power socket.

>
> It's perfectly OK to run it without batteries. I've been doing
> it for years. Unfortunately I cannot yet say conclusively that
> this mode extends the life of the battery. The boys in a hardware
> newsgroup might be able to tell you.
>



 
Unread 27-08-2007, 07:24 PM   #5
Kenny
Guest
 
Posts: n/a
Re: Is it Dangerous to run a laptop without the battery?

I have a fairly new Advent laptop and it won't run with the battery out!

--
Kenny Cargill




"Pegasus (MVP)" <I.can@fly.com> wrote in message
news:%23B8n78w3HHA.484@TK2MSFTNGP06.phx.gbl...
>
> "Justin" <Justin@discussions.microsoft.com> wrote in message
> news:29EA41E0-B253-43A9-AC6F-889C28A2C726@microsoft.com...
>> Is it dangerous to run a laptop of AC power without the battery? i.e.
>> won't
>> cause a fire.
>>
>> I don't want to ruin the battery life since I don't need to use it much
>> as I
>> am always near a power socket.

>
> It's perfectly OK to run it without batteries. I've been doing
> it for years. Unfortunately I cannot yet say conclusively that
> this mode extends the life of the battery. The boys in a hardware
> newsgroup might be able to tell you.
>



 
Unread 27-08-2007, 07:24 PM   #6
Anteaus
Guest
 
Posts: n/a
RE: Is it Dangerous to run a laptop without the battery?

One or two manufacturers say you shouldn't do that. In the majority of cases
it's perfectly OK though.

The main fire risk is from the battery itself, and arises if it suffers an
internal short, or is severely overcharged (if the laptop's internal
charge-regulator fails, that is.) Fires are rare but when a lithium pack does
'go up' it's very hard to extinguish, most conventional fire-extinguishers
won't deal with it.

There are mostly no components in a laptop itself which present any major
fire risk, other than the battery. Thus removing the battery leads to greater
safety.

The service-life of lithium batteries depends a lot on the temperature at
which they're stored. It's also said that they deteriorate less if stored at
somewhat less than full charge (but not flat, in which case they deteriorate
quickly.) Since many laptops run hot, and constantly trickle-charge the
battery, it can be assumed that a battery stored in a cool place and
occasionally charged will retain its performance longer than one left in the
computer all the time.

 
Unread 27-08-2007, 07:24 PM   #7
Anteaus
Guest
 
Posts: n/a
RE: Is it Dangerous to run a laptop without the battery?

One or two manufacturers say you shouldn't do that. In the majority of cases
it's perfectly OK though.

The main fire risk is from the battery itself, and arises if it suffers an
internal short, or is severely overcharged (if the laptop's internal
charge-regulator fails, that is.) Fires are rare but when a lithium pack does
'go up' it's very hard to extinguish, most conventional fire-extinguishers
won't deal with it.

There are mostly no components in a laptop itself which present any major
fire risk, other than the battery. Thus removing the battery leads to greater
safety.

The service-life of lithium batteries depends a lot on the temperature at
which they're stored. It's also said that they deteriorate less if stored at
somewhat less than full charge (but not flat, in which case they deteriorate
quickly.) Since many laptops run hot, and constantly trickle-charge the
battery, it can be assumed that a battery stored in a cool place and
occasionally charged will retain its performance longer than one left in the
computer all the time.

 
Unread 27-08-2007, 07:24 PM   #8
philo
Guest
 
Posts: n/a
Re: Is it Dangerous to run a laptop without the battery?


"Pegasus (MVP)" <I.can@fly.com> wrote in message
news:%23B8n78w3HHA.484@TK2MSFTNGP06.phx.gbl...
>
> "Justin" <Justin@discussions.microsoft.com> wrote in message
> news:29EA41E0-B253-43A9-AC6F-889C28A2C726@microsoft.com...
> > Is it dangerous to run a laptop of AC power without the battery? i.e.
> > won't
> > cause a fire.
> >
> > I don't want to ruin the battery life since I don't need to use it much

as
> > I
> > am always near a power socket.

>
> It's perfectly OK to run it without batteries. I've been doing
> it for years. Unfortunately I cannot yet say conclusively that
> this mode extends the life of the battery. The boys in a hardware
> newsgroup might be able to tell you.
>
>

That's correct..most laptops (but not all) can be run without a battery...

but the battery should be cycled occasionally. If left unused for a long
period of time...it can loose capacity.

Also...even if kept fully charged ...it needs to be discharged (no more than
80%) on occasion


 
Unread 27-08-2007, 07:24 PM   #9
philo
Guest
 
Posts: n/a
Re: Is it Dangerous to run a laptop without the battery?


"Pegasus (MVP)" <I.can@fly.com> wrote in message
news:%23B8n78w3HHA.484@TK2MSFTNGP06.phx.gbl...
>
> "Justin" <Justin@discussions.microsoft.com> wrote in message
> news:29EA41E0-B253-43A9-AC6F-889C28A2C726@microsoft.com...
> > Is it dangerous to run a laptop of AC power without the battery? i.e.
> > won't
> > cause a fire.
> >
> > I don't want to ruin the battery life since I don't need to use it much

as
> > I
> > am always near a power socket.

>
> It's perfectly OK to run it without batteries. I've been doing
> it for years. Unfortunately I cannot yet say conclusively that
> this mode extends the life of the battery. The boys in a hardware
> newsgroup might be able to tell you.
>
>

That's correct..most laptops (but not all) can be run without a battery...

but the battery should be cycled occasionally. If left unused for a long
period of time...it can loose capacity.

Also...even if kept fully charged ...it needs to be discharged (no more than
80%) on occasion


 
Unread 27-08-2007, 07:24 PM   #10
M.I.5
Guest
 
Posts: n/a
Re: Is it Dangerous to run a laptop without the battery?


"Anteaus" <Anteaus@discussions.microsoft.com> wrote in message
news:A994833D-C9FB-4D5B-A775-8CC381569C73@microsoft.com...
> One or two manufacturers say you shouldn't do that. In the majority of
> cases
> it's perfectly OK though.
>
> The main fire risk is from the battery itself, and arises if it suffers an
> internal short, or is severely overcharged (if the laptop's internal
> charge-regulator fails, that is.) Fires are rare but when a lithium pack
> does
> 'go up' it's very hard to extinguish, most conventional fire-extinguishers
> won't deal with it.
>


It's not hard to extinguish. It's completely impossible. Burning Li-ion
batteries generate their own oxygen. Generally, the batteries are quite
safe as long as they are properly used.

> There are mostly no components in a laptop itself which present any major
> fire risk, other than the battery. Thus removing the battery leads to
> greater
> safety.
>
> The service-life of lithium batteries depends a lot on the temperature at
> which they're stored. It's also said that they deteriorate less if stored
> at
> somewhat less than full charge (but not flat, in which case they
> deteriorate
> quickly.) Since many laptops run hot, and constantly trickle-charge the
> battery, it can be assumed that a battery stored in a cool place and
> occasionally charged will retain its performance longer than one left in
> the
> computer all the time.
>


Temperature is the most serious issue. Most of the so called experts tell
dire stories of life shortage if the batteries are stored at predominantly
full charge. However, I have several examples of batteries that are now
over 13 years old, and still exhibit a sunstantially full capacity in spite
of always being maintained at full charge.

I also have 2 batteries that completely died after 1 year's use, but then
they were made by Sony, so what could I expect?



 
 

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