Some questions about laptop batteries.

P

paulcheung

Active Member
Hi all,

I have a few questions about laptop batteries. Hope someone will be able to answer them.

How does Windows 7 or any OS know the status of a battery? like the charge capacity, the percentage of the charge and the wear conditions?

I use SIW to check the battery status and wear conditions. how does the program know all these conditions?

Does these battery pack have a chip to tell the OS or any program the status of the battery? the charge conditions and the wear conditions? or they simple use the voltage to determine the battery soon out of power? like the windows give you warning to plug in the charger.

I have bought a Dell replacement battery from amazon.com this year for my Dell Inspiron 1420 when I replace the CPU on June.

The battery is a larger one than the original. so the capacity is different than the original, maybe because that SIW did report different charge capacity and the charge condition, I know it should be more because is a larger battery but something was not right in the report but I didn't remember what was it. Now the battery has problem like it dead on me just after two month of use.

It can't be recognise by the laptop and windows. so it won't boot with it. when I plug in the charger and boot up windows 7 . it tell me there is no battery in the laptop and the battery is there and it not even say the battery condition is bad.

I leave it plug in the whole lastnight and today. it won't charge and just say no battery. the charging light blink orange like my Dell XPS M1710 with near dead battery.

The strange thing is that a while ago I was using the laptop with the charger plugin. and I just plugout the charger, the laptop still run, so I leave it plugout and start a movies with it, it still play after 50 minutes without the charger. so I believe the battery is still good and just something mess up in the battery pack,.

Is there anything I can do to fix it?

This is the battery I bought.

http://www.amazon.com/gp/product/B0027VOFV0/ref=oh_details_o02_s00_i00

Thank you in advance.
 
The battery is probbaly not a OEM one for that particular model, and BIOS is not reading it properly. Thus resulting in your odd light blinking and still able to use it.

Most batteries if not ALL are monitored by the BIOS in laptops, which are related back to the OS the percentage and so on of the battery.
 
You can try Resetting Bios and hope it detects everything.

If that dont work, then My guess is the monitoring Circuit in the Battery is not working properly with Bios and Windows
 
Thank you.

I just learned that these battery packs have digital circuit inside to monitor the battery status and even shutdown the battery after such days or charging cycles. Wicked manufacturers! I guess either the circuit is broke or it shutdown the battery after two months. Well as they always said you get what you paid for. cheapness not work out sometime.

Thanks again
 
After 100 minutes the movies still going on without shut down, I guess the cells are good, just the circuit get mess up. Is there anyway I can safely fix this?
Thanks.
 
Nope, No way to fix this without compromising the cells.

Why its not good to have aftermarket charger or battery on laptops. They can cause some damage to the laptop over time.

Ive seen some while in laptop bags overheat, and leak into the laptop and fried it.

IMO stick with the battery it came with till you can get a OEM replacement from dell. And just run laptop without the battery plugged in.
 
Doubt updating bios will make the battery work.

But if you have a newer version wont hurt to update it anyways
 
It can't flash as the laptop can't recognise the battery and keeping tell me to plug in the charger and the battery the same time. so it stuck.

Thanks
 
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