How to Distinguish Grade A and Grade B for Lithium-ion Battery

There are a lot of discussions about grade A and grade B when we start having a connection with new users of lithium-ion batteries. We found this is confusing the clients from the price and quality perspective. Lithium Storage as a professional lithium ion battery products supplier, we would like to share some basic knowledge about how to distinguish grade A and grade B as the reference.


Grade A and Grade B classification


Grade A: If a battery is judged to meet the factory quality standard in appearance, raw materials, parameters and production quality control points by battery manufacturers, the cells are judged as grade A.


Grade B: Once there is a problem in appearance, raw materials, parameter and production quality control points, battery manufacturers will classify problems cells as grade B. These problems are probably to have affection on the cycle life and have a potential concern of safety.


Key points to distinguish of grade A and grade B



Grade A 

Grade B


With QR code

Generally, the QR code is removed. It is possible to with QR code depending on management of battery manufactures.

Testing report

Have a sorting process according to internal resistance, voltage and capacity, this can ensure high consistency on group level and total batch level.

Generally, without sorting process, without battery parameters data. The batteries' consistency is not good even very bad in one batch.


Battery manufacturers 

will offer warranty

Battery manufacturer 

will not offer warranty

Notice: the above information is summarized based on our experience.


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