Nokia 6233 Cellular Phone "cell 2006 switching power" Questions

cell phone developed the following problem yesterday (8 Feb 2010), re which I have seen no discussion on the Internet. I can turn the phone on or off with the red power key on the keypad, but NO OTHER

...power it up, the time reverts to 09.00am and the date reverts to 1/1/2006...is there any way of stopping this plse? Hi, This is because your phone auxiliary battery is dead.The phone has an internal ...