That laptop is ten years old. How old is the battery? Even if it's a replacement battery, it may be failing. Test the battery: Open an Administrator CMD prompt (CMD, run as Administrator).Paste this command, and then press Enter:powercfg /batteryreport That will show a figure for the designed battery capacity (when new) and the current ("full charge") capacity. Also, run Dell Diagnostics:Immediately after pressing the power button to turn on the laptop (or after clicking the Reboot command), press and hold (or repeatedly press) F12 to enter the One Time Boot Menu, select Diagnostics and press Enter. The Dell Diagnostics will test major hardware components. Choose to run the extended tests.
Hie im using a dell latitude E6440 and the battery in not working and it says this battery is not available for use. The pc is working perfectly when connected to ac power
Battery not available for use