Thinkpads Forum

I want to know if ThinkPad can run on AC power after removing
battery from slot and try to start laptop ?

I heard some laptops runs on AC even if battery is not attached.
How about in ThinkPads? I have R50e . I havent tried. But
curious if it works...

It works, but I have heard that it is a bad idea? I dont' know why, though

I ran my X41 thinkpad only on AC a couple of weeks this summer because it was very hot for several weeks and my workstation increased the room temperature a lot more than the laptop.

The reason I ran without the battery was because I didn't want the battery to hit 60 degrees celcius for several hours/days.

It works, but I have heard that it is a bad idea? I dont' know why, though

I think the reason is that some people have very unstable power output and this can cause crashes... if the laptop has the battery installed the battery will work as a buffer and prevent crashes due to instable power supplying. I'm not sure about this but I think this is one of the reasons.

If you have never experienced any problems at your home you shouldn't worry about running it without the battery installed. I would personally recommend doing it.

Yeah . "mhca" i agree with you, and for the same reason i
heard user's remove battery. Because when laptop temperature
goes up, battery could get hot and will not hold charge. Recently
battery and laptop issue is getting hot
at http://www.cnet.com and everywhere. DELL computers
announced that 4000 series laptop users must check there batteries.
Is it ok to run laptop on AC power for 3~4 weeks without
running laptop on battery power for a minute ? I use laptop for
6~7 hours everyday and i run on AC power. I affraid if battery
pack loses it's charging capacity.
I use 100 % battery once in a month only. Will this affect
on battery ? I mean bad effect? Some people says 1 should
use battery 100% once every week and leave laptop charging
for over night ? I do charge my laptop over night when i use
100% battery once in a month.

Any comments or feedbacks ?

Regard's,
Amey Abhyankar.

mhca wrote: ... I think the reason is that some people have very unstable power output and this can cause crashes... if the laptop has the battery installed the battery will work as a buffer and prevent crashes due to instable power supplying. I'm not sure about this but I think this is one of the reasons...

I tend to agree with this. FWIW, I ran the TP360 in my signature for at least 3 years with no battery installed, using the AC adapter all the time. No problems. I don't know if a newer Thinkpad would behave differently... ??

I have been running my R31 for the last 3 years with out any batteries (unless I'm traveling with it). There has been no issues whats soever. I try to keep the batteries @ least 50% ( I usally check them every 2 months). I read somewhere that L-ion batteries that were to be stored should be @ 50%. So far they work as well as they did 5 years ago when I got this TP.

Storage_man

I'm sure the voltage is controlled by the AC adaptor "box".....no worries about putting in the batteries or not. I don;t see any useful of putting in the batteries......as heat is not good for Lithium Ions.

That is only if they get hot enough; on most models, you can check the temperature of the battery with either the Power Manager or with something that can access the ACPI.

Hi,
On thinkwiki there is an info that it is good idea to remove lithium ion batteries on AC
http://thinkwiki.org/wiki/Maintenance#Battery_treatment

israel wrote:Hi,
On thinkwiki there is an info that it is good idea to remove lithium ion batteries on AC
http://thinkwiki.org/wiki/Maintenance#Battery_treatment

Lies.

IBM's batteries are made by sony. Is IBM doing a recall or are they waiting for a laptop to explode first?

Saml01 wrote:IBM's batteries are made by sony.

...and sanyo, and panasonic...

there is no point in taking out your battery for prolonged AC use, since it won't be charging all the time anyway. they take days to drain even a tiny amount when not being used, and the charging threshold is smarter than you.

dsigma6 wrote:

Saml01 wrote:IBM's batteries are made by sony.

...and sanyo, and panasonic....

3.

Ok but what about the sony ones? recall?

No recall as of yet... I'm sure if/when it happens it will be posted here, as well as all over the news.

I prefer to leave the battery in at all times because I don't want to lose my work in case there is a blackout.

Saml01 wrote:Ok but what about the sony ones? recall?

No recall on these from Lenovo.

MG.

Hi Guys,
You might want to use a cooling pad during hot weather. Up here in Seattle I use moss and mildew sprays(joke), try notebook hardware controller(freeware) It will monitor temps & battery info.
Mike

http://www.pbus-167.com/nhc/nhc.htm