Electronics - Voltage and Current - Discussion

A primary battery can discharge once only, while a second battery is rechargeable. When discharge a rechargeable battery, its electrode volume and structure cause a reversible change. Therefore the design of a rechargeable battery must be adequate to adjust these changes. Since a primary battery internal structure is simpler, it does not have to accommodate reversible volume changes. The primary battery has bigger quality ratio and volume ratio than rechargeable battery, however it has a far bigger impedance, consequently the load capability is lower. Furthermore self-discharge of a primary battery is far lower than secondary one.

A cell is the fundamental source of electrical energy.

Cells can be divided into primary and secondary types.

The secondary cell is rechargeable, whereas the primary is not. The battery used in the car is of secondary type since it can be recharged.

But the cell used in torch are of a primary type, as they can not be recharged.

Writing on compact disk is an example of charge once stored indefinitely primary batteries can't recharge because they have simple structure and small in size hence it cannot do any reversible change. Although a small change can be made in charge of it by placing it in sunlight for some time.

Primary batteries or Disposable batteries are intended to be used once and discarded. These are most commonly used in portable devices.

The battery used in car is secondary type and it can be recharged, the cell used in torch is primary type and it can't be recharged.

Portable devices are nothing but devices which are freely movable from one place to another place.

Primary batteries are used in watches and radio etc. Secondary batteries are used in cell phones.

Option 1&2 both are correct isn't it?

Can't be recharged means charged once and used once.

Primary battery is used once time and secondary battery used again and again.

eg. of secondary batteries are, the battery which we use in mobiles