Give an example of a secondary cell.

Explanation

To answer the question about providing an example of a secondary cell, we can follow these steps:

### Step-by-Step Solution:

1. **Define a Secondary Cell**:
A secondary cell is a type of electrochemical cell that can be recharged. It operates through redox reactions that can occur in both directions, allowing the cell to be used multiple times.

2. **Explain the Redox Reaction**:
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