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Basics of Electrical Batteries which You Should Know

Electrical batteries are the DC sources which come in different sizes and designs. This post contains the basic knowledge on Electrical batteries which you should know.

What are Primary and Secondary Batteries

All types of batteries are classified into two classes. Secondary batteries are rechargeable batteries which can be recharged by passing current through them, whereas primary batteries are those batteries which can't be recharged and are used only once.

What is difference between AAAA, AAA, AA, C, D, and F

AAAA, AAA, AA, C, D, and F are different sizes of batteries which having a different current rating.
The physical sizes of these batteries are:
6 most common battery types-1.jpg
By Lead holder - Own work, CC BY-SA 3.0

Types of Batteries and their Practical Applications

Alkaline Batteries

These are general purpose batteries which are designed for low voltage applications such as for providing 1.5 V/9 V output.

Lithium Batteries

These are small sized cells which are found in watches, pacemakers, and cameras.


Nickel metal hydride belongs to the rechargeable class of batteries which are used in electric vehicles.


It is a 12 V battery which is a combination of 6 cells each having 2 V of output.

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