1. Core Reasons for Price Hike

It’s not an arbitrary price increase! Battery raw materials have soared collectively:

 

Except for battery-grade lithium carbonate, prices of key raw materials such as electrolyte and copper keep rising

 

MB31 price is directly linked to battery-grade lithium carbonate; rising costs drive terminal price adjustment

 

 Trap of Low-Price "Same Model": Distinguish Quality Grades

Heard someone say "MB31 price hasn’t changed elsewhere"? Chances are you’re looking at ESS grade (commonly called Grade B) cells, not original Grade A!

ESS Grade (Grade B)

❌ Fail to meet original Grade A standards

❌ Mostly shipped with polished codes; obvious marks when tearing off the black pad

❌ No original quality guarantee; short lifespan & high maintenance cost


The Original QR code of ESS grade:





After the QR code is remade: 






 

Original Grade A

✅ Intact & clear original code & QR code

✅ Qualified performance parameters; cycle life 6000-8000 times

✅ Can provide original EVE test report for each cell

One-sentence summary: Price determines quality; low price usually means compromised quality!

The Origial QR code of the Grade A MB31 cell:



3. 

 Two Quick Identification Methods

1. 

Directly ask for the original EVE test report for each cell; Grade A provides complete traceability

 

2.

Check by tearing off the black pad: Polished marks = ESS grade; Intact original code = Grade A

 

Supplementary note: We also provide ESS grade MB31 cells. Our core principle is supply on demand — we offer the exact grade of cells our customers need, with full transparency. We never pass off inferior products as high-quality ones or deceive customers! Focused on EVE battery cell supply chain, honest operation is the way to go. Feel free to contact us for any needs or questions~