Real footage comparison: A video shows the difference between grade B and grade A lithium-ion battery cells

Here are the real shots of A-grade and B-grade lithium battery cells you've been waiting for.

We previously wrote an article specifically discussing the differences between A-grade, B-grade, and C-grade battery cells. However, some friends left comments in the section asking: "How can we know if the lithium battery we bought is an A-grade cell?"

To help you see more clearly, today we have obtained our competitor's battery cells through a channel. This competitor adopts a low-price strategy, selling at only half of our price. Let's see how they manage to do this.

On the left are the competitor's battery cells, and on the right are our Sycain battery cells. At first glance, it may not be easy to spot the differences, but let's look at the details.

First, let's examine Sycain's A-grade battery cells. From the external structure, the individual cells appear more uniform, with neatly arranged and aesthetically pleasing packaging. The sealing layers of the outer packaging are tightly adhered. When packed into battery modules, each cell fits tightly together, seamless, indicating our good quality control.

Now, let's look at the competitor's B-grade battery cells. Firstly, the white sealing layers on the top are not tightly adhered. When viewed from the side, it's more obvious that one cell's casing is concave, while the other is protruding. What problems does this bring? When eight cells are assembled together, there will be larger gaps between the cells, making them prone to collision, loosening, or even desoldering during use due to poor quality. Additionally, such loosely controlled cells typically exhibit poor consistency, with significant differences in capacity, internal resistance, voltage, charging and discharging speeds, leading to lower overall stability and reliability of the battery pack, as well as a shorter lifespan.

How much is the price difference between A-grade and B-grade battery cells? It's 25%-50%. If the quality is sacrificed at every stage of assembling the battery cells into a battery pack, using inferior materials, then the final selling price difference between the two batteries will be over 50%. "The bitterness of poor quality remains long after the sweetness of low price is forgotten." Price is certainly important, but to gain long-term trust, quality must always come first.

Returning to the initial question, is there a way to determine whether the purchased battery cells are A-grade without opening the battery pack? There is a simple way to distinguish. You can check the merchant's promotional page. If A-grade cells are not specifically promoted, then they are definitely B-grade, C-grade, or even lower-tier cells.

If you need to purchase lithium batteries, please visit the product page for more information.