In lithium battery systems, the label is more than a sticker — it carries critical data about the pack's performance, electrical characteristics, safety limits, and manufacturing specifications. For engineers, end users, and procurement professionals, understanding label information ensures proper compatibility, safe usage, and optimized system integration.
Battery labels are the first reference point for evaluating a pack's suitability. Misunderstanding them can lead to:
- Voltage mismatch and device malfunction
- Inadequate discharge rate leading to shutdown
- Overcharge due to incompatible chargers
- Reduced battery life
- Severe safety risks in critical applications
This is the average voltage during normal operation, calculated by the number of cells in series × nominal cell voltage (typically 3.6V or 3.7V).
- 2S = 7.4V
- 3S = 11.1V
- 4S = 14.8V
- 7S = 25.9V
Tip: Always match device voltage requirements with the battery's nominal voltage.
This defines how much charge the battery can store and deliver. 1Ah = 1000mAh.
- Example: 5Ah = 5000mAh
- 1Ah means 1A current for 1 hour
Note: Usable capacity may vary depending on temperature, discharge rate, and aging.
Energy = Voltage × Capacity. This reflects the total power the battery can deliver.
- Example: 11.1V × 5Ah = 55.5Wh
Important for estimating runtime and required for shipping certifications (UN38.3).
This is the upper voltage limit during charging. Typically calculated as: cell count × 4.2V.
- 3S pack × 4.2V = 12.6V
Warning: Charging above this limit may lead to swelling or thermal runaway.
C-rate defines how fast the battery can be safely discharged.
- 1C = full discharge in 1 hour
- 2C = full discharge in 0.5 hour
- 0.5C = full discharge in 2 hours
Formula: Current = Capacity × C-rate. Example: 10Ah @ 2C = 20A.
Labels often include peak discharge (e.g., 40A for 10 seconds).
This affects energy efficiency and heating. Lower resistance = better performance.
- High-drain applications: < 30mΩ recommended
- Discharge: -20℃ ~ +60℃
- Charge: 0℃ ~ +45℃
Note: Using outside this range may lead to reduced lifespan or danger.
Determines physical compatibility with your device.
- Dimensions: L × W × H (mm)
- Weight: grams or kilograms
Labels often include:
- Batch number / serial number
- Manufacturer name
- Certifications: UN38.3, CE, RoHS, UL, IEC62133
High-quality packs should include these certifications and provide test reports on request.
- Engineers: Design circuit protection, voltage thresholds, and layout
- Buyers: Evaluate specs, certifications, and compatibility
- End-users: Use batteries safely and correctly
As a professional lithium battery pack manufacturer, Huawen New Power offers clearly labeled products, full datasheets, and custom labeling services for every project need.
