Solved

Asus A25000H battery problem

Posted on 2010-11-24
21
2,446 Views
Last Modified: 2012-05-10
Hello
i have an Asus  A25000H laptop, with a 14 V battery, as shown in attached picture.
i would like to know the function of the battery connections, pin for pin
a picture with all connections named will be fine !
PICT0001-800.jpg
0
Comment
Question by:nobus
  • 14
  • 7
21 Comments
 
LVL 20

Expert Comment

by:viki2000
ID: 34232898
Nobody wants to peak this question, being a difficult one.

That is a very specific question and I hope you know why you ask for 2 simple reasons: I look at the background of your computer-desk and the background of your 10 milions points.

If I would not see that, definitely I will ask you addition al questions as:
1) Could you upload a close/clear picture with all the labels from battery? I need to see the entire text.
2) Why do you need such info? Do you want to debug/repair the battery? It is just for hobby (another project), learn, study? What is the background of your problem and what do you try to achieve?

I ask you the above questions because I played a bit with batteries, chargers (digital). I know a bit about their background since I planned to make as hobby a digital charger with PC communications.
So, I suppose that you know that inside the battery, beside the accumulators, there is a electronic circuit/PCB board with a microcontroller that takes care of the battery charging/discharging/life time. Also inside are some thermistors attached to the battery.
The microchip inside communicates with the motherboard from laptop and the pins that you see are not only plus and minus from battery, but also the data from microchip.

In case you did not know the background behind, then a short info is here http://batteryuniversity.com/parttwo-47.htm

Is difficult to find what you asked directly, but maybe I could help to identify what you need if I know what you want.

In case you knew all these (and maybe more) and you only need to find where the plus and minus are, then:

- can you  still charge the battery? Or this is the problem: is not charging anymore?
- Or you just have the battery in your hands and that’s it?

I started with this approach to your question, because, in case you only need to find where is + and – then I recommend you to use a Multimeter (Voltmeter) on DC and to measure between the right and the left pins (most right and most left), because if you search information with the next keywords “laptop battery pinout” or “laptop battery pinouts” on Google Images:
http://www.google.com/images?um=1&hl=en&biw=1024&bih=547&tbs=isch%3A1&sa=1&q=laptop+battery+pinout&aq=f&aqi=g1&aql=&oq=&gs_rfai=
then you will see that for the most laptop batteries the + and – are connected by sides.

Please come back with some answers to my questions or at least tell me if something helped or I am on the right track.
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34233456
Additional info about your battery, so no need to upload more pictures:

System: Li-ion rechargeable battery
Voltage: 14.8 Volt
Capacity: 4400-4800mAh
Weight: 451gramm

Original rechargeable battery name or type:
•      A42-A2, 70-N7V1B3000, 90-N7V1B1000, 90-N7V1B1200
•      90-N7V1B1000, 90-N7V1B1200, 70N7V1B1002
Battery suitable for Asus Laptop Modell:
•      Asus A2500H, Asus A2, A2C, A2D, A2G, A2H, A2K, A2L, A2S, A2T
•      Asus A2000, A2000C, A2000D, A2000G, A2000H, A2000K
•      Asus A2000L, A2000S, A2000T, A2508H, A2514H, A2520D, A2534H
•      Asus A254OH, ISSAM Smartbook A2500H
If you really need the pins identification for digital data communication with the laptop then I suggest that with the above info in mind to search for one of the above laptops type:
-      Service manual
-      Laptop schematic

Knowing the pins from laptop motherboard for battery connection then automatic you identify the battery pin outs.
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34233536
It is around 13 USD for direct download:
http://www.service-manual.net/ashop/catalogue.php?cat=121

but I cannot guarantee you that you find the connection for battery inside, because if you go on http://laptop-schematics.com/free-samples/ and search/download for Asus, you will see that inside are a lot of schematics but I personally could not find the reference to battery.  Maybe you should take a closer look too.
0
 
LVL 91

Author Comment

by:nobus
ID: 34236798
viki tx for your post
but as you thought, i researched most you posted already
i want it to know more...because i ordered another battery - the laptop recognises it, and says it's loading - but it never loads actually (you pull the AC plug - and nothing..)
that one was replaced by another one  - and this is not recognised.
in the mean time i found the battery connection + and - but not the rest; - and the new battery only shows 12 V, while the old (partially working one) shows 15 V so i assume there are some bad cells in it.

this brings me to the 1000$ question : is there something wrong with the laptop - or did i have bad luck - and 2 bad batteries in a row?
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34238364
I presume there is no chance for a similar laptop.

If you know where is + and -  (by the way are by sides?) the only for purpose test you could try to charge it external with a digital battery charger (I had one in the lab), the to measure again.

If you would know the significance of the rest of the pins, how would that help? Because is only digital communication with the laptop.

In your place, if I knew where is + and – then I would consider that the rest of the pins for digital communication are OK if the information from/about battery can be read with the laptop, for instance using the trial version of the next software: http://www.passmark.com/products/batmon.htm After installation ,go on Info/Battery Information.

Now, regarding your 1000$ question:
-      of course best would be with a second laptop.
-      If there is no chance, then I try definitely to see of the battery can be charged at 14.8V with another charger. And here are 2 options: if you are a hobby/electronics guy then is not so difficult to make a simple one from a DC power supply – only for purpose test. If this is a bad idea then you could go on one shop for electronics and buy with warranty a digital electronic charger and you ask the seller if is possible to bring it back after 2 days in case does not fit to your needs. Then you test your battery and after 2 days you have your money back.
-      I see it like that: if you have no chance to swap with a good known battery or your battery to a compatible laptop then you must split the problem in 2: laptop charging circuit problem – from internal power supply – or as you said 2 bad batteries (probably cheap versions).
-      If you charge them outside at the proper voltage then the laptop may have problems.
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34238723
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34238785
0
 
LVL 91

Author Comment

by:nobus
ID: 34239645
if i had access to the same laptop, i would not have this Q...
and of course,  i tried charging it, when i knew the pins
i fail to see howacpi and smbus  can help here..
0
 
LVL 20

Accepted Solution

by:
viki2000 earned 500 total points
ID: 34240331
There are 2 websites:
http://translate.google.com/translate?hl=en&sl=vi&u=http://www.kythuatvitinh.com/&ei=xCT1TMnaGo7tOezC-OMI&sa=X&oi=translate&ct=result&resnum=1&ved=0CB8Q7gEwAA&prev=/search%3Fq%3Dwww.kythuatvitinh.com%26hl%3Den%26prmd%3Div

scroll down to the Laptop schematics then in Asus Schematic – unfortunately is not A2 series, but you can take a look at the power/battery connection diagrams.

Same you can do here:
http://translate.googleusercontent.com/translate_c?hl=en&sl=ru&u=http://www.texnic.ru/shems/nout/Assus.htm&prev=/search%3Fq%3Dtexnic%2Bru%26hl%3Den%26prmd%3Div&rurl=translate.google.com&usg=ALkJrhjHtLxPWI5MY15RmXc_J4RVpfpzoQ

or a mirror for some of the Asus laptops schematics:
http://letitbit.net/download/1525508/36459.3d455f40733cdb8ec5a9e6c3b0e6/Asus_laptop_service_manuals_www.texnic.ru.rar.html  - Regular download

I do not know if these are illegal or not. If they are – please request for delete this comment.
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34240337
One more thought is:
-      If now you have 3 batteries then you could open one of them using a cutter and a thin flat screwdriver (or even 2). It is not a nice job – I did it 2 times – but then you could try to charge the battery pack with an external charger and then measure each single battery with an voltmeter to find out if there is or not a faulty/bad one.
-      Then you can check the PCB board inside the laptop battery and try to identify the microcontroller and follow the connections from pins to the board – possible to the microcontroller pins.
-      If you know the microcontroller then you could try to look at the manufacturer website for recommended usage diagram and finally to find the pin outs to your battery.  
0
IT, Stop Being Called Into Every Meeting

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

 
LVL 91

Author Comment

by:nobus
ID: 34240767
from first link - i did not see any schematic
none on 2nd site found either
i dontt want to destroy the batteries - 1 is still in use, other must be sent back
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34240813
try the last link with regular download, wait 60 sec then download
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34241027
for the first 2 links, is a jungle, the files are there but you have to dig around.
I searched and A2 series is not among them.
In mean time maybe is a bit a help Asus A3F attached here
ASUS-A3F.jpg
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34241105
Then only to see how to take it apart and how is it inside an Asus A2 battery:
http://jakubz.blogspot.com/2008/10/disassembling-asus-accumulator.html
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34242363
To explain myself with 2 of the above links:
I mentioned ACPI link, because if you go on Device Manager/Batteries you will see ACPI compliant.
The website contains the description of the Power Interface Configuration and together with SMBUS based on I2C http://en.wikipedia.org/wiki/System_Management_Bus describes the implementation of the digital communication for laptop batteries.
It has no importance for the present problem.

It shows the difficulty to debug the rest of the pins except + and – except if you have a Digital (Storage) Oscilloscope to help you to see/record/interpret the communication signals. Probably you will identify to main wires as SMCLK and SMDATA. The other one is from Thermistors.
In the end I think for the present problem is useless.

So, what I meant is: forget about the rest of the pins if you know + and – of the battery. Just try to charge it external.

I hope that you did not order a 12V battery instead of 14.8V, or by mistake you did not receive what you ordered.
The worse part can be a problem on mother board as it is mentioned here on the next simple guide:
http://www.laptoprepair101.com/laptop/2010/07/21/troubleshoot-laptop-battery-charging-problems/

Good luck!
0
 
LVL 91

Author Comment

by:nobus
ID: 34245850
ok - thanks for the material.
the A3F looks like the  A2H
and the dissassembly link can help too
0
 
LVL 91

Author Comment

by:nobus
ID: 34272557
while not 100% what i asked - it is enough for me
tx viki
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34272874
I realized is not a direct answer to your question, but I hoped some information with a different approach will help.
I tried to be in your shoes and see what would I do.
Thank you for the points too.
0
 
LVL 91

Author Comment

by:nobus
ID: 34273252
if i may ask - how did you find the russian sites?  are you russian speaking?
0
 
LVL 20

Expert Comment

by:viki2000
ID: 34273777
No, I am not. I have no idea what is written on their websites. I do not read, speak or understand Russian.
I learned to look on different websites with different unknown languages, even Chinese, with a sort of "intuition" before Google translate appeared, which is a useful tool now.
Few things to know: even on Chinese websites, when you move the mouse/cursor over a link, at the bottom of the page appear in english many times useful info.

Russian and Chinese websites contain a lot of useful info, unfortunately hidden/closed for many of us - that's why I try to surf them.

I speak some French, besides English and now I learn German.
My mother tongue is Romanain, but has nothing to do with Russian or Chinese language.

To answer straight to your question: I found them searching on "not recommended" websites. I cannot say more here on Experts Exchange.
0
 
LVL 91

Author Comment

by:nobus
ID: 34273827
ok -thanks for the info; appreciated
0

Featured Post

Enabling OSINT in Activity Based Intelligence

Activity based intelligence (ABI) requires access to all available sources of data. Recorded Future allows analysts to observe structured data on the open, deep, and dark web.

Join & Write a Comment

I originally posted this Article Here (http://www.bestelectronicarticles.com/computers/software-troubleshooting/how-to-find-a-driver-for-you-devices-in-windows.html) and thought I would now share with the Experts Exchange community. Driver Proble…
Introduction: When experiencing some peculiar problem with the functioning of your PC, how many times has it happened that you look for a solution and even google can’t help? It could be that you are one of the only few people on earth who ma…
Excel styles will make formatting consistent and let you apply and change formatting faster. In this tutorial, you'll learn how to use Excel's built-in styles, how to modify styles, and how to create your own. You'll also learn how to use your custo…
This video shows how to remove a single email address from the Outlook 2010 Auto Suggestion memory. NOTE: For Outlook 2016 and 2013 perform the exact same steps. Open a new email: Click the New email button in Outlook. Start typing the address: …

760 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now