What are the types of batteries?

Answer 1

There are two kinds of battery:

1. wet cell, where the electrolyte is a liquid
2. dry cell, where the electrolyte is immobilized within a damp paste or gel

There are two classes of battery:

1. primary, non-rechargeable one time use, the electrochemical corrosion reactions that generate the electricity are not reversible
2. secondary, rechargeable and reusable, the electrochemical corrosion reactions that generate the electricity are fully reversible

There are a virtually unlimited variety of battery chemistries, depending on choice of electrolyte and the two metals (or other materials) used as electrodes.

And given all these options, the same kind/class/chemistry of battery may be packaged in an unlimited variety of ways.

Therefor the total number of battery types is practically uncountable.

Answer 2

there are wet and dry batteries