[SOLVED] Laptop randomly shuts down when unplugged

[mrgoodman]

My laptop (Asus X541U running Windows 10) started to shutdown randomly when it is on battery, after a couples of weeks it completely stopped working on battery.

I took it to someone who disassembled the laptop and tested the battery — which was working fine — nd cleaned the laptop a bit then the laptop worked fine with battery and without random shutdowns.

Now after 3 months the problem is back again the laptop started to shutdown randomly when it is unplugged and I am afraid it will completely stop working on battery after couple of days.

What can possibly be the problem? I know is that the problem not in the battery.

 

[InvalidError]

If the battery "test" was simply charging it and see if it'll hold voltage, that isn't enough to qualify as working. Each cell needs to be tested under load to measure internal resistance and its effective capacity. The battery is only as good as its weakest cell, maybe you have one bad cell causing the laptop to shut off.

 

[mrgoodman]

thank you for your answer however this does not explain why after disassembling the laptop the problem completely fixed for about 3 months

 

[InvalidError]

If they tested the battery by charging each cell individually which would be the ideal way to reset state-of-charge imbalance, could be that it took three months for the weakest cell to get down to an unusable state of charge.

Unless the battery pack or laptop has charge balancing built into it, the whole battery quits charging with the first cell that reaches end-of-charge voltage and quits powering the device as soon as the weakest cell hits its cut-off voltage. As the split between the worst cell reading empty during discharge and good cells being left increasingly close to full, your usable capacity approaches zero.

If the battery or laptop does have charge leveling, then the circuitry may be defective.

 

[SamirD]

Do you have a spare original battery? If not, it's a good time to buy one. Don't get compatible junk either--get the real thing. Then you have a spare battery and one that you can use to test if the installed battery is the issue or if it is something else.

 

[mrgoodman]

yesterday I tried to disassemble the laptop my self. i removed the cover but couldnt remove the battery so i put it back together and now its working without problem again!!I literally did nothing but removing the keyboard and put it back ! any idea what could be the problem?

 

[InvalidError]

If disassembling and re-assembling temporarily "fixes" it, then you have a loose connection or bad solder joint somewhere that "comes good" from getting rattled around during the dis-assembly and re-assembly process.