If you’ve ever checked the rated capacity of a lithium-ion battery (e.g., 3000mAh or 5000mAh), you may wonder: Is this the actual capacity? And some clients may notice batteries/cells labeled with lower capacity than previous years. The answer lies in certification standards—especially CCC (China) and CB (international), which often require manufacturers to print the minimum guaranteed capacity, not the nominal (average) value.
Given China’s vast consumer market with its enormous population and purchasing power, many foreign companies often comply with local regulations such as minimum capacity labeling requirements(CCC) as a strategic imperative for market entry.
1. What’s the Difference?
Minimum Capacity →The lowest capacity the manufacturer guarantees (e.g., If a battery is labeled with a capacity of 2900mAh, then all batteries of the same model must meet or exceed this capacity.)
Nominal Capacity → The average capacity (e.g., 3000mAh), reflecting the actual performance of most batteries, which may vary between cells.
Regulations like CCC and CB prioritize consumer protection, ensuring no battery performs below the labeled capacity.
Taking the Panasonic NCR18650GA as an example, capacity labeling was not required before obtaining CCC certification. However, after certification, the minimum capacity must be clearly marked. Below is a reference photo:
2. Why Do CCC & CB Require Minimum Capacity Labeling?
CCC (China Compulsory Certification)
Mandates minimum capacity labeling (e.g., GB 31241 standard).
Prevents overpromising—if a 3000mAh battery is labeled as such, it must never test below that.
Market surveillance fines companies for false claims.
CB Scheme (International IEC Standards)
While not always mandatory, most CB-certified batteries follow minimum capacity labeling for global compliance.
Some countries (e.g., South Korea, Saudi Arabia) enforce it when adopting CB reports.
3. How to Avoid Fake Capacity Claims?
1. Check certifications (CCC, CB, UL) – More reliable than unbranded cells.
2. Review datasheets – Reputable brands publish discharge test data.
3. Be skeptical of extreme claims – A tiny “10,000mAh” cell is likely fake.
Conclusion
CCC and CB certifications drive transparency by requiring minimum capacity labels, protecting users from underperforming batteries. When buying lithium-ion cells, always prefer certified products with clear capacity guarantees.
If you have trouble selecting the right battery? Keeppower is your trusted battery specialist. Keeppower holds comprehensive certifications, demonstrating our commitment to transparency and professionalism. We are committed to delivering premium services and providing safe, reliable energy solutions worldwide!