Combination of Cells in SeriesWhen two or more cells are connected in a series, they are said to be connected end to end with the positive terminal of one cell connected to the negative terminal of the next cell.Advantages of Connecting Cells in SeriesConnecting cells in series has several advantages, such as:1. Increased voltage: The voltage of the series combination is equal to the sum of the voltages of the individual cells.2. Longer life: When cells are connected in series, the current through each cell is the same, which helps to ensure that the cells discharge evenly and last longer.3. Better efficiency: When cells are connected in series, the internal resistance of the combination is higher than that of a single cell, which helps to reduce the amount of energy lost as heat.Disadvantages of Connecting Cells in SeriesConnecting cells in series also has some disadvantages, such as:1. Reduced current capacity: When cells are connected in series, the current capacity of the combination is equal to the current capacity of the weakest cell.2. Higher cost: Connecting cells in series requires more cells, which increases the cost of the overall system.ConclusionIn conclusion, the combination of two or more cells in series is an effective way to increase voltage and improve efficiency, but it also has some drawbacks, such as reduced current capacity and higher cost.

Combination of two or more cell in series is called Battery. Where as single cell is known as Cell