@dvtrv 

https://www.dell.com/support/article/en-us/sln292953/how-to-troubleshoot-dell-laptop-battery-issues?lang=en

No issue was not resolved 

Remove Charging pin from Laptop socket.

Click start and type device in the search field, then select “Device Manager“.

You can also find Device Manager by right click on the “My Computer” icon.

Expand the Batteries category and right click the “Microsoft ACPI-Compliant Control Method Battery”, then select Uninstall.

Right and Click “Scan for hardware changes”

Wait for 10 seconds and Plug in Charger again.

If it doesn't work, reboot and try the same steps again.

It's working for me

Batteries last 18-24 months on average. You have a 7 yr old model long out of any warranty. It is not worth spending any money to replace the battery and you would not fine a genuine Dell replacement battery on such an old model. Batteries are warrantied only for the first year. No manufacturer covers batteries on old computers. Read the Dell info about batteries. It includes this--

Note: Like most laptops, Dell laptops use lithium-ion batteries, which can swell due to battery age, the number of charge cycles, or exposure to high heat. While a swollen pack does not represent a safety concern, you should not use damaged or swollen components. If you have an issue with a battery pack swelling, we recommend discontinuing use and replacing it with a Dell-authorized battery.