Dell Inspiron 14z

Hi,

If I understand you correctly, you are referring to Inspiron 5423/14z. 

You can follow the steps below to disable battery charging and use the computer on AC adapter: 

• Click on Windows logo on desktop.
• Type 'Power options' in search bar above that.
• Click on Power Options.
• Check for the 'Battery Health Meter' among the different options on the left side of window.
• Check for battery health and check if the battery charging is disabled.
• Check the box for 'Turn off the battery charging'.
• Restart your computer to check if the issue is fixed.  

Also, you can check the manual of your computer from the link below:

ftp://ftp.dell.com/Manuals/all-products/esuprt_laptop/esuprt_inspiron_laptop/inspiron-14z-5423_Owner%27s%20Manual_en-us.pdf

Copy and paste the link in address bar and hit enter to view the system manual.

Please reply for further clarifications. 

in the window where you have shown turn off the battery charging i cant find the option.  All I can see is the battery capacity. and in the window i cant see battery health meter. i am attaching a screen shot.