Question Why won't my laptop operate without the charger?

Sep 11, 2020
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My laptop is showing that my battery is at 100% fully charged, however it needs the AC charging adapter in order to power on, it will not operate without the charger, as soon as i pull the charger, it automatically immediately switches off???
Could someone help me with this please?, my Laptop is a Toshiba Satellite L840.
Thank You
 

raykneale

Estimable
Oct 5, 2017
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You can test to see if the battery is connected internally by removing the battery while the netbook is on and plugged in. If the netbook tells you that the battery has been removed after you actually remove it... and then acknowledges that you just inserted a battery after you actually put it back in, then your netbook is correctly connecting to the battery.
If one or more of the cells within the battery are bad/defective, they can make the battery report a full/100% charge while being charged but then fail when under load. Another common symptom of a failing/defective cell in a laptop battery is what appears to be a normal drain until somewhere between 50%-20%, then immediate drop to almost 0%.
It is not uncommon for one cell within a laptop/netbook battery to fail. Depending on the make of netbook or laptop, and whether the battery is an extended life model, there are usually between 3 and 6 cells within a netbook/laptop battery... not that this range is definitive by any means, for there are 8, 9, and 12 cell batteries out there as well for some models. I don't believe I've ever seen one with fewer than 3 though.
I can't say for sure, since I don't have your netbook in front of me, but the chances are good that this is just your netbook telling you to purchase a new battery.
 
Sep 15, 2020
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About six months ago a laptop I have exhibited a similar symptom, it would only operate when the charger was connected and powered.
Without hesitation I went on Amazon and ordered a replacement battery.
Once the new battery was installed, it worked like new,
Rechargeable batteries, like laptop battery packs, have embedded electronic circuits that can fail.
I've had perfectly good battery packs become unusable because the circuitry failed.
 
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