TESTING AND CALIBRATING THE BATTERY USING HP SYSTEM DIANOSTICS(preferred method)

SOLUTION:
                      (1)Unplug the power cord and turn off the computer.
                      (2)Click the power button to turn on the computer.
                      (3)Press the Esc button immediately when seeing the HP or the Compaq logo screen.
                           The start up menus appears.
                      (4)Press F2 to select F2 System Diagnostics.
                      (5)Select Battery Test from the list of diagnostic or component tests.
                      (6)Plug in the power cord.
                      (7)Click Start Battery Test on the battery test page.