Modern batteries use a variety of chemicals for power.
They are divided into two main categories, Primary or Rechargeable battery.
Primary battery is non-rechargeable and is very common and is used in many different devices/applications.
The different type of Primary battery are:
* Extra Heavy Duty Battery(Zinc Chloride/Zinc Carbon) - Commonly known as Extra Heavy Duty battery, zinc-chloride/zinc-carbon chemistry is used in all inexpensive AA, C and D dry-cell batteries.
* Alkaline Battery(Alkaline) - Alkaline chemistry is used in common brands like Duracell and Energizer batteries and is more powerful than Extra Heavy Duty battery.
* Hearing Aid Battery(Zinc-air) - This battery is lightweight and has very high power density.
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