Error Code 3600:0123. Msg: Battery test failed - reporting attached charger.

I have a Dell Inspiron 9400. I ran the Diagnostics program Symptom Tree option and chose "System will Not Run Off the Battery". There are 3 tests: 1) battery charger test 2) battery communication test and 3) AC Adaptor Info Test. When
test 1 starts I receive a prompt to "please disconnect the charger now". If I do disconnect the AC power the computer is turned off. The battery is in the left batter bay but when I check the power status by pushing the button on the battery, none of the 5 little green lights comes on. If I run the tests and do not disconnect the charger when
prompted, the 3 test will run and finish. Test 1 gives me the following error: Error Code 3600:0123. Msg: Battery test failed - reporting attached charger. Tests 2 and 3 pass without any errors. Does that error message help me
determine if the problem is in the battery or in the charging mechanism?