How is electricity generated from a battery cell and how does it get exhausted ?

Answer 1

The "power" in any electric current is 'voltage'.
'Voltage' is the measure of the potential difference of electrons between two substances, and therefore the potential for electrons to be transferred between them.
Batteries generate electricity through any one of several electrochemical reactions.
Two different types of metals are placed in a catalyst (usually a liquid). When a circuit is completed between the positive side and the negative side, electrolysis occurs - the above mentioned transferring of electrons through chemical reactions from one metal to the other. The difference in potential felt between the positive and negative charges (giving off an electron results in a positive charge, accepting it results in a negative charge) is again your volts.
The reaction continues until the battery reaches homeostasis (equilibrium, balance).
In some kinds of batteries applying an outside electric current properly can reverse the process - allowing you to recharge the battery.
Rechargeable batteries eventually become exhausted because of of oxidation of the polarizing metals or due to a 'memory' buildup. 'Memory' refers to a battery that is not completely discharged before it is recharged. This is the major reason for the degradation of rechargeable battery life cycles.

Answer 2

The electricity is released/generated in the process of chemical reaction among substances. They do so by exchanging electrons. One way is to allow them to interact in by having one substance to exchange electrons with another by a wire or an electric circuit. The more chemically aggressive they are towards each other (oxidation vs. reduction potentials) the more energy a particular battery cell will pack.

For more information please see the references supplied.

Answer 3

There are two chemicals in a battery cell, separated by a sheet of metal. The two chemicals react, putting electrons in motion, but slowly turn the sheet of metal into a different compound. I wish I could tell you the chemicals and metals, but it has been a long time since chemistry.

Answer 4

elec is generated by the flow of electrons from a +ve place called anode to the -ve one called cathode... the process is called electrolysis... it occurs due to the property of diff elements...
as long as electrons move from +ve to -ve., the process continues... once theanode element gets empty, it stops.. all this occurs in a medium called an electrolyte

Answer 5

http://www.open2.net/science/roughscience/library/batteries.htm