Notebook self "unplug" when battery is full

Hello,

My laptop (Acer Aspire 5750G) shows "unplugged" and run on batteries when it gets fully charged, even though it is still plugged.
If I unplug it it plug it again, it shows "plugged in, charging" for a while, but when it reaches 100% it shows unplugged again...

This is apparently a software issue, since it recognizes it is plugged and charges the battery until it's full.

Another thing is that in the last days I updated the BIOS, opened the laptop to reapply the thermal paste, cleaning, etc... and put another small cooler (really small, 25mm) in the laptop to keep it from overheating (the CPU clock was dropping all the time because of it).
I don't think my maintenance could be any harmful though.

Anyone have any idea? I don't know what to do!


Laptop's specs (I don't think it's useful, but anyway)

Acer Aspire 5750G

Core i3 2310 2.1GHz
6GB DDR3 RAM
GT 540M 1GB


Thanks!

 

this is not a "problem", it is a feature meant to protect the battery.

 

Is it? I've never seen it before... Thanks for the reply btw.

Anyway, is there a way of disabling it?
When it's running on the battery the laptop doesn't work well under load, for instance, gaming.. It seems that the battery's power is not enough to keep the laptop running under load, forcing the CPU to slow down, by lowering the multiplier.

 

your joking right? That ruins a battery. The laptop should never do that and there is something wrong. A battery has a PCM/PCB that keeps it from overcharging....ah i am tired of repeating this. I need to just make a detailed answer to answer all and copy paste. The PCM/PCB keeps the battery from draining too low and overcharging. The PCM/PCB is in the actual battery. All Li-ion packs have them. This is causing your laptop to slow down and cycle unnecessarily and will murder your battery.

As for why or how this is happening i dont have the faintest clue. This is new to me.

 

Hey, thanks.

What exactly is causing it to slow down? I though the battery just couldn't handle the system at full load.

What does it have to do with the battery or it's PCB? It sounds like it's something with the motherboard not getting the power from the power source when the battery becomes full.

When you say cycle unnecessarily you mean charging and discharging, right?


When I started this thread (about 45 minutes ago) I unplugged the laptop and let the battery drain a bit. I plugged it back again after a while, and let it charging. It reached 100% and it kept showing "100%, plugged in" for a few minutes, and for a brief period, I thought the problem had solved itself..
However, it didn't take long until it "beeped" again (this laptop beeps every time you plug or unplug the power supply) and "unplugged" was shown again in the system tray...
This just made the problem weirder, cause it took a few minutes (5 or 10) for the laptop to decide to disconnect itself from the power adapter. It wasn't instantly as it was before..

Anyone have any idea or seen something like that before? Thanks.

 

it slows down due to its on battery. Battery doesn't have the voltage or amps to run hardware at full speed. I gtg i'll elaborate later

 

Ok, that's what I thought.. Thanks for the reply.

Just to keep you informed, I tried in the last few hours to:

Totally discharge the battery while plugged in, to see if at any point it would go back to the "plugged in" status and start to charge the battery again. It didn't work.. The battery died and the laptop hibernated while plugged in...

I changed the BIOS again, and it didn't work. Shortly after the battery went fully charged, it beeped and it started to run from the battery as if it was unplugged.. I even checked with AIDA64 if it was "really" running on battery, and yes.. The voltage drops a bit, just as if I had unplugged it.

What can it be! It doesn't seem like it is a software issue now.. I have no idea...

 

Something is definitely wrong. Are you using the power supply that came with it or a third party aftermarket one?

 

I'm using the original power supply.

Another thing I just noticed: I was in the motherboard BIOS settings, just checking things when it beeped, and the LED that indicates "charging" turned off.. Nothing to do with OS or anything softwarewise I think..

 

When the battery is charged and the laptop says unplugged, what happens when you pop out the battery? It should run fine, if not then you have big problems.

If it's discharging the battery while the cord is plugged in you most likely have a BIOS or some kind of firmware issue.

It charges fine though? It's just when it gets to "charged" status it automatically thinks it's unplugged and won't charge?

 

Hello and thanks, I just tested what you said, and the worse happened.. The laptop just suddenly shut down as if it was unplugged..

However, after I popped the battery out I pressed the power button, without touching the power plug.
For my surprise, the laptop turned on, and it's running on AC power since then.
I'll let it running on AC power for a while to see if anything happens.

As I said, I already changed the BIOS, but I'll try to flash the old BIOS later, just to make sure.

Yes, it charges fine. It's just when the battery is full that it decides to "unplug" itself.
When it does, not only Windows show it in the tray icon, but the LED that indicates if the battery is "charging/fully charged" turns off, and of course the beep sound.

I'm getting so annoyed about that! I can't keep the laptop plugged in!
Also, it seems that it ran on batteries all night long, cause when I turned it on again today, the battery was a bit discharged (I didn't shut it down during the night, just put it in sleep mode).

 

also does it say the battery is loosing power? Do you see it go to 100-90%?


EDIT: er new posts. I would return it. Did you buy it recently or is it under warranty?

 

Hello everybody, thanks for all the replies!

I just solved the problem..
I removed the little cooler, and it all came back to normal...
I still don't know why, but I'm glad it's not a motherboard/hardware issue.

Again, thanks!

 

Removed what little cooler?

 

i agree what little cooler?

 

Mentioned in the starting post:

vrgimael, was it tapping off power inside the laptop?

 

lol totally missed that -_-

Can you upload a picture of said cooler. I am curious on what it is.