For the Nokia N80, when the battery is about to explode, are there any signs or problems which indicates this?

Question

ei.

the vibration has stopped (that might be because of the numerous times i've dropped it),

you can only hear the speaker on the other end of the line through loudspeaker and headset...

etc...

Answer 1

The indication that the battery is about to explode is that the phone's user asks stupid questions on Yahoo! Answers.

N80's batteries do not explode. There was a battery recall more than 1 year ago due to some faulty batteries manufactured by Sony. If you have such a battery (check the serial number at http://batteryreplacement.nokia.com/batt... then replace it asap. If not, don't worry, it will never explode.