Battery charging problems

In this post I explain how to troubleshoot battery charging problems. I will discuss most common failure examples and suggest some troubleshooting steps.

Example 1.

Laptop shuts off when AC adapter unplugged.

When you move the cursor arrow over the battery icon while the laptop is connected to AC adapter, it show the remaining charge and says “charging”.

The power meter utility (if available) also shows that battery is connected and charging.

But… as soon as you unplug the AC adapter, the laptop shuts off completely.

Possible problems:
1. The battery not seated correctly. Try reconnecting it.
2. The battery contacts got dirty or oxidized and it’s not making good connection with the motherboard. Apply some electronic contact cleaner on the contacts.
3. If reconnecting the battery doesn’t help, most likely it’s bad and has to be replaced.
4. If you replaced the battery but the problem still exists, this is motherboard related failure. Apparently the charging circuit on the motherboard failed. In this case the whole motherboard has to be replaced (or repaired on the component level).

 

Example 2.

The battery not detected by the laptop.

There is a red cross on the battery icon.

If you move the cursor arrow over the battery icon, it says “no battery detected”.

Possible problems:
1. Most likely the battery is bad. You have a very good chance to fix this problem by replacing it with a new one.
2. If replacing the battery doesn’t help, this is motherboard related failure. The motherboard has to be replaced (or repaired on component level).

 

Example 3.

The battery discharges very quickly after it reaches some critical point.

The battery detected by the laptop and charges properly to 100%.
When you unplug the AC adapter, it take normal time to discharge until some critical point (let’s say 80%) but after that the battery discharges very quickly to 0%.

Possible problems:
This is battery failed. It has to be replaced with a new one.

 

Example 4.

The battery charges only if the power plug positioned correctly.

You have to wiggle the power plug in order to charge the battery. After you find the right position, it charges properly.

Possible problems:
1. AC adapter failure. The AC adapter power cable is damaged. Here’s how to test your AC adapter.
2. If the AC adapter works fine, most likely this is power jack (connector where you plug power adapter) failure. In this case the power jack has to be replaced.


149 Responses

  1. Amanda

    my lap top was charging and my son kick the charger in when it was charging and now the computter won’t work and when i try to charge it won’t charge.

  2. cj2600

    phuong to,

    all software not use(avg,itunes,e-cam,..).when i click it, appear tables file download – security warning and ask do you want save or run this file?

    Sounds like a virus.
    1. Backup your files with an external hard USB hard drive.
    http://www.laptoprepair101.com/laptop/2007/04/17/access-hard-drive-using-usb-enclosure/
    2. When you transfer files to another computer, make sure the computer has a good and up to date antivirus software installed. You don’t want infected files on another computer.
    3. Reinstall OS on the infected laptop.

  3. phuong to

    all software not use(avg,itunes,e-cam,..).when i click it, appear tables file download – security warning and ask do you want save or run this file?
    HELP ME!

  4. suhail k m,

    ther is cross mark on the battey when charger connected. But you know battery was charging

    Are you still using the original factory battery or this it third-party replacement battery?

  5. I have been trying so hard for the past 2 weeks to figure out what is wrong with my battery on my compaq presario cq61. I did everything from removing drives, taking out the battery, etc….but but my 12 yr old son..moved around my ac cord into my laptop and got it into the right spot and it start charging again….it is finally at 100% again!!!! So I have to say its the port or the adaptor. Hope this helps. I thought it was a software problem for so long….

  6. suhail k m

    I have compaq v9000 and emachines e725 laptops, ther is cross mark on the battey when charger connected. But you know battery was charging

  7. Ankur,

    i have a C700 Compaq laptop its work on battary but no power on with adptor

    Could be bad AC adapter. Test it with a voltmeter. Make sure the adapter outputs correct voltage.
    Could be bad DC jack in the laptop.
    What happens if you remove the battery and start the laptop just from AC adapter. Any signs of life at all?

  8. Asif Nawaz,

    I am laptop Technician.wants help in motherboard charging circuit to repair on component level.can you help me?

    Unfortunately, I cannot help you with that. I don’t repair motherboards on component level.

  9. i have a C700 Compaq laptop its work on battary but no power on with adptor

    pls help

  10. Asif Nawaz

    I am laptop Technician.wants help in motherboard charging circuit to repair on component level.can you help me?If yes then i will start my question.or is there another blog you know to make this type of discussion.any help will be apriciated.

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