HP Error Code 601 is an alert message it means your Primary battery or internal battery is not fine and according to Hp Assistance you have to change your battery. If you have this issue visit my website.
Re-insert The Battery.
Run Battery Test.
Run The HP Laptop Without The Battery. Precautionary Measures. Always use a UPS. Don't Leave the Charging Terminal Exposed. Never Remove the Power Cord. Don't touch the battery contacts.
Replace your PC battery.