You can 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. Your laptop is five years old. If that is the original battery, it is near end of life and failing. It may also be swelling, which can cause touchpad and keyboard issues. I recommend that you open the laptop to check the battery. If it is swelling even a little, you must remove it and safely dispose of it. You may buy a genuine Dell battery direct from Dell or from Parts-People. (each of those links goes directly to the battery for your laptop model) Whenever touching components or working inside a computer, wear a grounded wrist strap, also called anti-static wrist strap, ESD wrist strap, or ground bracelet. It's a cheap and sensible precaution. Rest the laptop on an anti-static mat or at least a reasonable alternative such as corrugated cardboard. Swollen Battery Information and Guidance | Dell Canada
This past week my Dell laptop has been acting really odd. The charge never goes up past 5%, in fact, it's loosing charge somehow. It is constantly plugged in and has been for four days. The battery has not gone up once. My computer didn't have a long battery life to begin with anyways. When it COULD get to full charge, it would only last maybe two hours? I only ever use my laptop for school & occasionally a game, but not high graphics or anything. Do I need to replace something? What is going on here?    Secondly, the keyboard has stopped working. When i type one key it either 1. Doesn't sense it, or 2. Types it like eight times. It's been blown out with air and everything, and i still don't know what's going on.  Everything else is fine, performance is great, loads everything fine. It's always had a mild overheating problem, but I've never thought anything of it since it never caused the computer to crash or lag. Anyways.. how can i fix my battery/keyboard?
Dell G3 battery issues