In recent years, portable power banks have become incredibly popular, with a rapidly growing user base and a surge in demand from manufacturers, many of whom have launched their own products to compete in this lucrative market. However, current portable power banks don't boast particularly advanced technology; their appeal lies more in the internal components used.
Currently, mainstream power banks are mainly composed of three parts: the casing, the circuit board, and the battery cell. Among these three components, the battery cell and the circuit board directly affect the use of the product. As the core of the entire power bank, the battery cell plays a crucial role, and its quality directly reflects the overall quality of the power bank.
In the construction of portable power banks, the battery cell plays a very important role.
As for mainstream power banks, the quality of their battery cells varies considerably. This is most evident in off-brand products, as the current power bank market lacks strict regulations. Manufacturers are responsible for ensuring the quality of their products, including materials, safety features, and more. However, judging from the several power bank accidents exposed this year, many manufacturers lack a high level of self-discipline.
In fact, many users talk about inferior battery cells, but what exactly constitutes an inferior battery cell? And what are the different types of battery cells? What are the differences between them? Let's talk about it today.
Product Classification
Battery cells undergo certain tests before leaving the factory.
First, let's look at product grading. Many users may not know that battery cells are actually graded. This is because current battery cell manufacturing processes cannot guarantee that every product will meet the expected targets. Some products may not reach the target values or have minor issues. During pre-shipment testing, they are graded. Currently, battery cells are mainly divided into three grades. One is Grade A (A+, AAA, etc., all fall into this category). Grade A cells are those whose parameters meet the company's technical specifications and are free of abnormalities. It's important to emphasize that Grade A refers to meeting the company's technical specifications; this quality is not universally recognized and may differ from some current qualitative standards. It does not represent universally accepted quality. (Of course, for some major brands, their specifications are aligned with current market demands, and their Grade A cells generally represent universally accepted quality.)
To reduce costs, manufacturers often choose some B-grade products.
