Types of Cells& battery

 

Types of Cells& battery

The cells are classified into two categories.

1. Primary cells

2. Secondary cells

Primary Cells

Primary cells are widely used in clocks, 

watches, remote controls and calculators.

Primary cells:

The cells that cannot be recharged are 

called as ‘primary cells’. Some of the 

primary cells are Alkaline cell, Lithium 

cell, Zinc-Carbon cell or dry cell.

Eg.

available in the voltage rEgating of 1.5 V, 

3 V, 9 V and 12 V and the current rating 

of 0.2 A, 0.5 A, 1 A and 2 A. AA and AAA

type of cells (1.5V) are used in clocks and 

remote controls. 1.5 V, 3 V button cells are 

used in watches and computers, respec-

tively. 9 V cell is used in multimeter and 

cordless microphone.

Secondary Cells:

The cells that can be recharged are called as ‘secondary cells’. Some of the second-ary cells are lead-acid cell, Lithium ion cell and Nickel Cadmium cell.

Eg.

shows the structure of sec-

ondary cell. Lead-acid cell is widely used 

in two-wheel and four-wheel vehicles. 

Lithium ion cells are used in laptops and 

cell phones. Nickel cadmium cells are used 

in flash lights, emergency lights and toys.