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Fujitsu lifebook t4020 battery connnection/charge problem

Battery window display says:
total battery power remaining: 0% (charging)

it never climbs abouve 0% and when unplug power cord, laptop dies immediatley. this just started yesterday aftw 2+ years of good service. same results with all 3 batterieis i have. i dusted contacts with a toothbrush to now avail.

seems like the batteries are not connecting to the laptop. Ideas? if it is a motherboard solder joint that came lose or something about how much to fix? maybe not worht fixing?

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So, "all three batteries" suddenly get this zero charge. That is VERY "incriminating". Almost 100% certain you have either a connector problem (most likely) or a power regulator circuit failure (less likely). Get a flashlight and magnifying glass, and look deep into the battery compartment at the connector. Almost certain there is some bent pin or other irregularity there. If so, be careful straightening it out. Disconnect PSU and still, be careful not to cross-connect two connectors. Even though PSU and battery are removed, there is still a small battery inside that keeps that circuit alive for clock and PRAM settings... don't want to short that circuit out. Work only on one pin/strip at a time. Hope this is the problem. Because if it is the regulator circuit -that is a motherboard matter. Major repair, usually not worth the cost. But I really think that scenario is unlikely, unless you caused some serious short recently. Let me know what you see inside.

Posted on Feb 11, 2008

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Evrytime I unplug the charger on my lenovo S10-2 ,it automatically turns off. a little help please! :((


Sounds to me like you may have a problem with your laptop battery! It may be time for a replacement. You can find some on ebay that work fairly well; I have bought and used several different laptop batteries from ebay with success! Or, you can always purchase from Lenovo themselves.
  1. eBay: Here is a link to batteries that will work with your laptop.
  2. Lenovo: Black battery is here. White battery is here.
A little information before you decide to fork out some money:
  • Keep in mind the color of your laptop; don't buy a white battery if you have a black laptop and vice versa, unless you want that kind of look, of course.
Hope this helps!

Jun 07, 2011 | Computers & Internet

Tip

AC Adapter issues Q & A.


<p><b>Laptop switching to battery while connected to AC adapter</b><br /> <p><b>Q.</b> While turned on, the laptop will switch to battery power even if connected with the AC adaptor (sometimes during boot-up, or after a while) until the battery drains out, he then goes to hibernation (the battery light is off). If no battery in the laptop, it will shut down, and the AC light will blink very fast. The battery (li-ion) will only charge up to 10%, where it then jumps right up to 100%, and will discharge from 100% to 90% then jump to 0%, go to hibernation, and fails to complete the process, shutting down. The adaptor makes a small "camera flash charging" sound, stabilizing at 19v. When charging, it repeatedly makes the "charging sound" Faulty AC adaptor? Or Faulty battery? Or Both?<br /> <p><b>A. </b>First problem: The laptop switches to battery power even with connected AC adapter. Most likely you have a faulty power jack. It's either broken or loose. It's a known issue with laptops and you can fix it by replacing/resoldering the power jack or relocating it outside laptop case.<br /> <p>It also could be a problem with the power cord. Find a multimeter and check the AC adapter. See if the power cuts off when you jiggle the power cord. If it does, replace the adapter.<br /> <p>Second problem: The battery will discharge from 100% to 90% and then jump to 0%. It sounds like a bad battery.<br /> <p><b>Battery charging light is on even when power adapter is unplugged and laptop is stitched off</b><br /> <p><b>Q.</b>The yellow light for battery charging does not go even after switching the laptop off and power jack is disconnected. Battery does not charge at all with power source connected. <br /> <p><b>A.</b> First of all, try reconnection the battery if you haven't done it already.<br />The battery plugs directly into the connector attached to the motherboard. If the battery charging light stay on even when the power adapter is unplugged and the laptop is switched off, it's either bad battery or something is wrong with the motherboard. The only way to find the culprit is testing the laptop with another known good battery.<br /> <p>Also, you can try this. Remove the battery and plug in the power adapter. If the battery charging LED lights up even when the battery is removed, most likely you have a problem with the motherboard.<br /> <p><b>Battery charges only when the laptop is off</b><br /> <p><b>Q.</b> Bought a Laptop without AC Adapter. I noticed it would charge the battery OK when the laptop was off but once in windows it would not charge the battery.<br /> <p><b>A.</b> This is very important to choose the right AC adapter for your laptop. The output voltage MUST be exactly the same. If your laptop requires 18.5V you must use 18.5V adapter. The amperage should be the same or higher. If the laptop requires 4.74A adapter, you'll have to find an adapter which provides 4.74A or MORE. <br /> <p><b>While using AC adapter alone or battery alone, laptop works. While using them together, I am getting a problem.</b><br /> <p><b>Q.</b> While using AC adapter alone or battery alone, laptop works. However while using them together, laptop LED lights blinks and the power meter for battery drops down immediately to 0% critical level, whereas the battery LED indicator says it's full. I tried to unplug the AC adaptor while it went down to 0%, then the power meter for the battery came back to normal 85%.<br /> <p><b>A.</b> There could be a few different reasons why it happens:<br />1. It might be an issue with the BIOS. Make sure the laptop has the latest version of BIOS installed, update it if needed.<br />2. It might be a software related issue. If you have some kind of power management utility installed try uninstalling it and use Windows power management utility instead. Also I would try reinstalling the operating system if upgrading the BIOS or removing the power management utility does not help.<br />3. If you still experience the same problem even after upgrading the BIOS and reinstalling Windows, most likely you have a problem with the motherboard. Apparently the charging circuit is not working properly. I assume it's not a problem with the battery. You'll have to check the motherboard in this case. <br /> <p><b>Problem with my battery. 100% to about 40% the battery discharging normally then suddenly from 40% it drop directly to 2%.</b><br /> <p><b>Q.</b> When I use only on battery, from 100% to about 40% the battery discharging normally (last about 1 hour) then suddenly from 40% it drop directly to 2%.<br />When I plug the AC cord, it won't directly charge (the charge LED is still not on). After 10 to 20 minutes it then starts to charge the battery (the indicator say that it can be charged to 100%).<br />If I turn-off the laptop and then charge the battery, it won't also directly charge but the delay is much shorter (maybe just about 1-2 minutes).<br />Is this the sign of a bad battery (when hot it can't be charged?) or maybe a bad AC adapter (not enough power to charge the battery when the laptop is turned on?)<br />Note that this symptom is always repeating when I use the laptop.<br /> <p><b>A.</b> From the first part of your complaint description I can see that you have a bad battery. The percentage might vary, but the process of discharging is the same - the battery discharges fine until some point and then the remaining charge suddenly drops to the minimum. You'll have to replace the battery.<br />I'm not sure about the second part. Probably it's a battery related problem too. Just in case check if there is a newer version of BIOS available for your laptop. If you find one, upgrade the BIOS. <br /> <p><b>The battery is 100% charged but it will die within a few minutes as soon as the laptop is unplugged.</b><br /> <p><b>Q.</b> When I unplug the power it will run off the battery, the battery icon says it is 100% charged and I have 2+ hrs remaining, but within a few minutes I get the "critical battery level" message and it will die. When I plug it back into AC power the battery charge light comes on (and will remain on for over a hour), but I will have the same problem with it dying as soon as it is unplugged. Do I need a new battery?<br /> <p><b>A.</b> It looks like you have a bad battery. Here are some behaviors typical for a dying laptop battery:<br />1. The battery charges normally (according to the battery icon) but as soon as you unplug the laptop, it dies almost momentarily.<br />2. The battery charges normally. When you unplug the laptop, it discharges normally until some point and after that point starts discharging very fast. For example it might take 10-15 minutes to discharge from 100% to 80% and then it discharges from 80% to 0 for 2-3 minutes. <br />

on Mar 15, 2011 | Computers & Internet

Tip

AC Adapter issues Q & A.


<p><b>Laptop switching to battery while connected to AC adapter</b><br /> <p><b>Q.</b> While turned on, the laptop will switch to battery power even if connected with the AC adaptor (sometimes during boot-up, or after a while) until the battery drains out, he then goes to hibernation (the battery light is off). If no battery in the laptop, it will shut down, and the AC light will blink very fast. The battery (li-ion) will only charge up to 10%, where it then jumps right up to 100%, and will discharge from 100% to 90% then jump to 0%, go to hibernation, and fails to complete the process, shutting down. The adaptor makes a small "camera flash charging" sound, stabilizing at 19v. When charging, it repeatedly makes the "charging sound" Faulty AC adaptor? Or Faulty battery? Or Both?<br /> <p><b>A. </b>First problem: The laptop switches to battery power even with connected AC adapter. Most likely you have a faulty power jack. It's either broken or loose. It's a known issue with laptops and you can fix it by replacing/resoldering the power jack or relocating it outside laptop case.<br /> <p>It also could be a problem with the power cord. Find a multimeter and check the AC adapter. See if the power cuts off when you jiggle the power cord. If it does, replace the adapter.<br /> <p>Second problem: The battery will discharge from 100% to 90% and then jump to 0%. It sounds like a bad battery.<br /> <p><b>Battery charging light is on even when power adapter is unplugged and laptop is stitched off</b><br /> <p><b>Q.</b>The yellow light for battery charging does not go even after switching the laptop off and power jack is disconnected. Battery does not charge at all with power source connected. <br /> <p><b>A.</b> First of all, try reconnection the battery if you haven't done it already.<br />The battery plugs directly into the connector attached to the motherboard. If the battery charging light stay on even when the power adapter is unplugged and the laptop is switched off, it's either bad battery or something is wrong with the motherboard. The only way to find the culprit is testing the laptop with another known good battery.<br /> <p>Also, you can try this. Remove the battery and plug in the power adapter. If the battery charging LED lights up even when the battery is removed, most likely you have a problem with the motherboard.<br /> <p><b>Battery charges only when the laptop is off</b><br /> <p><b>Q.</b> Bought a Laptop without AC Adapter. I noticed it would charge the battery OK when the laptop was off but once in windows it would not charge the battery.<br /> <p><b>A.</b> This is very important to choose the right AC adapter for your laptop. The output voltage MUST be exactly the same. If your laptop requires 18.5V you must use 18.5V adapter. The amperage should be the same or higher. If the laptop requires 4.74A adapter, you'll have to find an adapter which provides 4.74A or MORE. <br /> <p><b>While using AC adapter alone or battery alone, laptop works. While using them together, I am getting a problem.</b><br /> <p><b>Q.</b> While using AC adapter alone or battery alone, laptop works. However while using them together, laptop LED lights blinks and the power meter for battery drops down immediately to 0% critical level, whereas the battery LED indicator says it's full. I tried to unplug the AC adaptor while it went down to 0%, then the power meter for the battery came back to normal 85%.<br /> <p><b>A.</b> There could be a few different reasons why it happens:<br />1. It might be an issue with the BIOS. Make sure the laptop has the latest version of BIOS installed, update it if needed.<br />2. It might be a software related issue. If you have some kind of power management utility installed try uninstalling it and use Windows power management utility instead. Also I would try reinstalling the operating system if upgrading the BIOS or removing the power management utility does not help.<br />3. If you still experience the same problem even after upgrading the BIOS and reinstalling Windows, most likely you have a problem with the motherboard. Apparently the charging circuit is not working properly. I assume it's not a problem with the battery. You'll have to check the motherboard in this case. <br /> <p><b>Problem with my battery. 100% to about 40% the battery discharging normally then suddenly from 40% it drop directly to 2%.</b><br /> <p><b>Q.</b> When I use only on battery, from 100% to about 40% the battery discharging normally (last about 1 hour) then suddenly from 40% it drop directly to 2%.<br />When I plug the AC cord, it won't directly charge (the charge LED is still not on). After 10 to 20 minutes it then starts to charge the battery (the indicator say that it can be charged to 100%).<br />If I turn-off the laptop and then charge the battery, it won't also directly charge but the delay is much shorter (maybe just about 1-2 minutes).<br />Is this the sign of a bad battery (when hot it can't be charged?) or maybe a bad AC adapter (not enough power to charge the battery when the laptop is turned on?)<br />Note that this symptom is always repeating when I use the laptop.<br /> <p><b>A.</b> From the first part of your complaint description I can see that you have a bad battery. The percentage might vary, but the process of discharging is the same - the battery discharges fine until some point and then the remaining charge suddenly drops to the minimum. You'll have to replace the battery.<br />I'm not sure about the second part. Probably it's a battery related problem too. Just in case check if there is a newer version of BIOS available for your laptop. If you find one, upgrade the BIOS. <br /> <p><b>The battery is 100% charged but it will die within a few minutes as soon as the laptop is unplugged.</b><br /> <p><b>Q.</b> When I unplug the power it will run off the battery, the battery icon says it is 100% charged and I have 2+ hrs remaining, but within a few minutes I get the "critical battery level" message and it will die. When I plug it back into AC power the battery charge light comes on (and will remain on for over a hour), but I will have the same problem with it dying as soon as it is unplugged. Do I need a new battery?<br /> <p><b>A.</b> It looks like you have a bad battery. Here are some behaviors typical for a dying laptop battery:<br />1. The battery charges normally (according to the battery icon) but as soon as you unplug the laptop, it dies almost momentarily.<br />2. The battery charges normally. When you unplug the laptop, it discharges normally until some point and after that point starts discharging very fast. For example it might take 10-15 minutes to discharge from 100% to 80% and then it discharges from 80% to 0 for 2-3 minutes

on Jan 17, 2011 | Computers & Internet

1 Answer

MD781 battery wont charge...will run with the power cord plugged in, I replace the battery first thinking that may be the trouble. Still wont charge...it would run for a short while on the battery when...


Hi

Can you please try to leave laptop switched off
plug in laptop and leave until the light on front goes green or at least 2/3 hrs

then unplug power cord
switch on laptop and use it or leave it until it looses all power and switches off

then recharge until green

when battery is fully charged always un plug and use on battery power
until it reaches about 10% before recharging

some people even remove their battery to preserve it if they always use power cord

if this does not sort the problem please come back to us

many thanks

Feb 23, 2011 | Gateway MD7818u Notebook

1 Answer

HP compaq 6735s Shuts facing a very weird problem concerning its power. I have left my laptop charging without use for 3-4 days, today I came back home and wanted to use my laptop, I turned it on and...


You need to replace the battery as it has expired.
They are available by typing the battery model number or laptop model number into ebay or Google or indeed any search engine.
Hope that helps.

Nov 19, 2010 | HP Computers & Internet

Tip

Properly recharge the battery of a laptop


<span><span>The</span> <span>best use</span> <span>of a</span> <span>battery,</span> <span>regardless of</span> <span>its use</span> <span>(</span><span>PC</span><span>, car</span><span>,</span> <span>rechargeable lamp</span><span>)</span> <span>is</span> <span>still</span> <span>work</span> <span>to do</span> <span>in</span> <span>charges</span> <span>and</span> <span>discharges,</span> <span>otherwise</span> <span>it</span> <span>gets used</span> <span>(</span><span>it</span> <span>keeps the</span> <span>memory</span><span>)</span> <span>load</span> <span>short</span> <span>and</span> <span>even</span> <span>totally</span> <span>d&eacute;cherg&eacute;e</span><span>,</span> <span>most</span> <span>will not resume</span> <span>its</span> <span>initial capacity</span><span>.</span><br /><span>A</span> <span>laptop</span> <span>is</span> <span>made</span> <span>to go</span> <span>in nature</span> <span>and</span> <span>therefore</span> <span>to work</span> <span>regularly</span> <span>on</span> <span>drums</span><span>.</span> <span>A</span> <span>PC</span> <span>that</span> <span>remains</span> <span>permanently</span> <span>in the office</span> <span>sector</span> <span>will see</span> <span>its</span> <span>battery</span> <span>quickly</span> <span>died</span><span>.</span></span> <span><span>The</span> <span>best solution</span> <span>is</span> <span>to</span> <span>unplug</span> <span>the</span> <span>power cord</span> <span>as</span> <span>often</span> <span>as possible when</span> <span>the</span> <span>battery</span> <span>is</span> <span>fully</span> <span>charged</span> <span>and allowed to</span> <span>drain</span> <span>up to 30</span><span>%</span> <span>capacity</span><span>.</span></span> <img src="nidalkom01_10.jpg" />

on Jan 08, 2011 | Computers & Internet

Tip

AC Adapter issues Q & A.


Laptop switching to battery while connected to AC adapter
Q. While turned on, the laptop will switch to battery power even if connected with the AC adaptor (sometimes during boot-up, or after a while) until the battery drains out, he then goes to hibernation (the battery light is off). If no battery in the laptop, it will shut down, and the AC light will blink very fast. The battery (li-ion) will only charge up to 10%, where it then jumps right up to 100%, and will discharge from 100% to 90% then jump to 0%, go to hibernation, and fails to complete the process, shutting down. The adaptor makes a small “camera flash charging” sound, stabilizing at 19v. When charging, it repeatedly makes the “charging sound” Faulty AC adaptor? Or Faulty battery? Or Both?
A. First problem: The laptop switches to battery power even with connected AC adapter. Most likely you have a faulty power jack. It’s either broken or loose. It’s a known issue with laptops and you can fix it by replacing/resoldering the power jack or relocating it outside laptop case.
It also could be a problem with the power cord. Find a multimeter and check the AC adapter. See if the power cuts off when you jiggle the power cord. If it does, replace the adapter.
Second problem: The battery will discharge from 100% to 90% and then jump to 0%. It sounds like a bad battery.
Battery charging light is on even when power adapter is unplugged and laptop is stitched off
Q.The yellow light for battery charging does not go even after switching the laptop off and power jack is disconnected. Battery does not charge at all with power source connected.
A. First of all, try reconnection the battery if you haven’t done it already.
The battery plugs directly into the connector attached to the motherboard. If the battery charging light stay on even when the power adapter is unplugged and the laptop is switched off, it’s either bad battery or something is wrong with the motherboard. The only way to find the culprit is testing the laptop with another known good battery.
Also, you can try this. Remove the battery and plug in the power adapter. If the battery charging LED lights up even when the battery is removed, most likely you have a problem with the motherboard.
Battery charges only when the laptop is off
Q. Bought a Laptop without AC Adapter. I noticed it would charge the battery OK when the laptop was off but once in windows it would not charge the battery.
A. This is very important to choose the right AC adapter for your laptop. The output voltage MUST be exactly the same. If your laptop requires 18.5V you must use 18.5V adapter. The amperage should be the same or higher. If the laptop requires 4.74A adapter, you’ll have to find an adapter which provides 4.74A or MORE.
While using AC adapter alone or battery alone, laptop works. While using them together, I am getting a problem.
Q. While using AC adapter alone or battery alone, laptop works. However while using them together, laptop LED lights blinks and the power meter for battery drops down immediately to 0% critical level, whereas the battery LED indicator says it’s full. I tried to unplug the AC adaptor while it went down to 0%, then the power meter for the battery came back to normal 85%.
A. There could be a few different reasons why it happens:
1. It might be an issue with the BIOS. Make sure the laptop has the latest version of BIOS installed, update it if needed.
2. It might be a software related issue. If you have some kind of power management utility installed try uninstalling it and use Windows power management utility instead. Also I would try reinstalling the operating system if upgrading the BIOS or removing the power management utility does not help.
3. If you still experience the same problem even after upgrading the BIOS and reinstalling Windows, most likely you have a problem with the motherboard. Apparently the charging circuit is not working properly. I assume it’s not a problem with the battery. You’ll have to check the motherboard in this case.
Problem with my battery. 100% to about 40% the battery discharging normally then suddenly from 40% it drop directly to 2%.
Q. When I use only on battery, from 100% to about 40% the battery discharging normally (last about 1 hour) then suddenly from 40% it drop directly to 2%.
When I plug the AC cord, it won’t directly charge (the charge LED is still not on). After 10 to 20 minutes it then starts to charge the battery (the indicator say that it can be charged to 100%).
If I turn-off the laptop and then charge the battery, it won’t also directly charge but the delay is much shorter (maybe just about 1-2 minutes).
Is this the sign of a bad battery (when hot it can’t be charged?) or maybe a bad AC adapter (not enough power to charge the battery when the laptop is turned on?)
Note that this symptom is always repeating when I use the laptop.
A. From the first part of your complaint description I can see that you have a bad battery. The percentage might vary, but the process of discharging is the same – the battery discharges fine until some point and then the remaining charge suddenly drops to the minimum. You’ll have to replace the battery.
I’m not sure about the second part. Probably it’s a battery related problem too. Just in case check if there is a newer version of BIOS available for your laptop. If you find one, upgrade the BIOS.
The battery is 100% charged but it will die within a few minutes as soon as the laptop is unplugged.
Q. When I unplug the power it will run off the battery, the battery icon says it is 100% charged and I have 2+ hrs remaining, but within a few minutes I get the “critical battery level” message and it will die. When I plug it back into AC power the battery charge light comes on (and will remain on for over a hour), but I will have the same problem with it dying as soon as it is unplugged. Do I need a new battery?
A. It looks like you have a bad battery. Here are some behaviors typical for a dying laptop battery:
1. The battery charges normally (according to the battery icon) but as soon as you unplug the laptop, it dies almost momentarily.
2. The battery charges normally. When you unplug the laptop, it discharges normally until some point and after that point starts discharging very fast. For example it might take 10-15 minutes to discharge from 100% to 80% and then it discharges from 80% to 0 for 2-3 minutes.

on Jun 12, 2010 | Computers & Internet

1 Answer

HP compaq 6735s Shuts facing a very weird problem concerning its power. I have left my laptop charging without use for 3-4 days, today I came back home and wanted to use my laptop, I turned it on and...


Looks like your battery is having a problem. Remove the battery and replace after a couple of hours. If problem remains replace the battery with another to test, if this works, then the problem is with the adapter unit. Get a new one.

Nov 19, 2010 | Computers & Internet

1 Answer

My new compatible battery 02K6626 is not charging in my T20.


You can buy a completely compatible IBM ThinkPad T20 battery. Search in Google for the model of you wanted battery,then you always can find some best online laptop battery shop which have a high fame and have running for some years ,they provide both good batteries and service.

Apr 29, 2010 | IBM ThinkPad T20 2647 Notebook

1 Answer

My battery shows up. says 0% remaining (charging), but it never charges and shuts off as soon as the power cord is unpluged.


1) Could be the battery is bad.
2) The charging port could be damaged
3) The adapter charge cord could be damaged
4) If not too expensive, I'd try a new battery first or better yet, if you could find someone with a like model to test their battery in your pc and see if it charges in your machine.
5) Ask a local shop if they'd be able to troubleshoot it for you.

Sep 18, 2009 | Dell Inspiron B130 Notebook

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