NO NO NO NO NO...
To solve the "Batter Exhausted" problem, first open the battery compartment and check what type of battery you are using - Alkaline, Lithium etc.
Next switch on the camera and press menu button and then tools option (wrench).
In the list, find the "Battery Type". You should see some options:
Alkaline,
COOL PIX (Ni-MH)
Lithium
Select one of the above options corresponding to the type of battery you are using.
That should solve the problem.