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why does my dell laptop battery not charge

Well, the charger is plugged in, but it says not charging. This has happened twice. I would have thought bad battery or bad charger, except luckily the first time it occured right after buying a new hard drive. I did a hard reset on the battery and that worked. Now, it has happened again. I tried the regular battery reset, but that did not work. I tried uninstalling device and reinstall. did not work either. Oddly, what did work was the following:
I had about 38% battery left.

I unplugged the power cord from both laptop and wall outlet. I removed the batter. Computer went dead. I wiped the battery connectors with a clean cloth several times. I put the batter back in and turned the laptop on with battery only. I plugged power cord into side of laptop, then into wall outlet. Immediately, the laptop began charging again! I am not sure why this worked. Maybe some techy out there may know. When I tried the battery reset, I turned the computer off before taking out the battery.

Then took it out. Plugged in laptop with power cord and powered it. Then shut down and placed battery in. I turned back on. but nothing. It may have to do with having the laptop already on when taking out the battery, or placing back the power cord, or could just be the wiping the battery with cloth???? Please list Dell model number and version of windows. Ex: Dell Inspiron 3543, windows 10 In the meantime, please check status of in the BIOS. If adapter isn't detected in BIOS, the system will continue to received power but will not charge the battery.

Please follow steps below: 1. Power off system. 2. Power on system, quickly start tapping F2 key continuously. You should be in the BIOS. The status of adapter usually listed under the main screen. The adapter should say the adapter type, then it's a issue with the adapter, and most likely needs to replace with a Dell genuine adapter that suitable for the system.

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