battery drainage

Please download and install latest Dell Power Manager from your Dell Product Support page.

Guide to Dell Power Manager | Dell US

Just click on link below, select Find Drivers, correct operating system (windows 10?), and then stroll down Dell Power Manager Service.

Support for Vostro 3590 | Drivers & Downloads | Dell US

After, installing latest Dell Power Manager, right click battery icon at the bottom of taskbar or type Dell Power Manager onto search box, you should be able to see the application now.

In Dell Power Manager application, check the battery settings.

Standard - Fully charges the battery at a moderate rate. This setting provides a balanced approach to extending battery life while still providing a reasonably fast charging time. Recommended for users who frequently switch between battery and external power sources.

Express Charge - Quickly charges the battery using Dell fast-charge technology. Recommended for users who need the battery to charge quickly. If the system is powered off, then the battery typically charges to 80 percent within one hour and 100 percent in two hours. Charge time may be longer if the system is powered on.

Primarily AC Use - Extends battery life by lowering the charge threshold, so that the battery never charges to 100 percent capacity. Recommended for users who primarily operate the system while plugged into an external power source.

Adaptive - Automatically optimizes battery settings based on the user's typical patterns. Recommended for users who want to "set it and forget it."

Custom - User selects when the battery starts and stops charging. Recommended for advanced users.

After checking battery settings, change settings to another battery settings to see if it will make any difference. For example: if it's set to Standard, change to Adaptive and then restart system. Hopefully battery is working normally now.

Please view addition information that might be helpful in video below: