The battery is about maybe 4 years old. In the bios the battery health still says good but it dies early. Any way to make the battery percentages more accurate?I used to fix Dells for a long time. The D620 is very venerable. Aftermarket batteries don't always play well, and sometimes it can report the wrong charge, or it just discharges too quickly. Afte a year I wouldn't trust the battery honestly. How old is it? There should be a section in the BIOS that tells you the battery health status, or you can run built-in diagnostics to verify it (f12 at Dell logo for boot options).