CALB is a leading research and manufacturing company specializing in battery technology. The group owns numerous intellectual properties that make their batteries popular in the global market. Over the years, CALB products have been shipped worldwide, contributing to green power usage and reducing CO2 emissions.

Ten major scientific research innovation platforms including "National Enterprise Technology Center", "Postdoctoral Research Workstation", and "Henan Engineering Technology Research Center".

Core technology intellectual property coverage reaches 100%. Patents have been applied for in China, the United States, Europe and other countries/regions, winning the China Excellent Patent Award. Certified by Jiangsu Provincial Intellectual Property Management Standardization and recognized as Henan Provincial Intellectual Property Application Demonstration Enterprise.

22 scientific research projects have passed technological achievements appraisal by Henan Province or the Aviation Industry Corporation of China, with 10 identified as internationally advanced level and 1 as internationally leading level.

9000 cycles with 0.5C charge to 3.65V, 0.5C discharge to 2.5V per cycle. After 9000 cycles, 80% capacity remains. Real capacity: 300-304ah.

The 280ah Lifepo4 lithium battery is a favorite choice for DIY users in solar energy storage and off-grid backup systems. Ideal for caravan, camp caravan, golf cart, forklift, electrical bike, motorbike, and various other applications.

Screw-connected prismatic battery cells can be easily mounted and connected with bus bars and screws, making them perfect for DIY projects.

• Safety: Safest lithium battery with built-in PCM/PCB, non-flammable and non-explosive
• Clean and Green Energy: No toxic materials contained
• Long Life Cycle: 80% capacity remains after 500 deep cycles
• No Memory Effect: Highly efficient charging anytime with no capacity reduction
• Operation Temperature: -20~55°C
• Excellent high-temperature performance and resistance
• Low self-discharge rate: < 3% monthly

Deep cycle capability with more than 2000 times life span - significantly longer life than lead acid batteries.

Foam-protected UN-certified cartons for safe transportation.

Whether using Grade A, B, C, or used LiFePO4 cells, initial balancing is essential to bring them to the same state of charge. Voltage alone is unreliable for determining state of charge due to the flat charge and discharge curve of this chemistry.

Proper initial balance ensures accurate capacity test results. If cells are unbalanced, it can trigger BMS protection and provide inaccurate capacity readings. Manual top balancing is recommended for large battery banks or cells with varying internal resistance.

While parallel connection allows natural balancing over time (weeks or months), manual top balancing provides immediate and reliable results, especially important for large loads and capacity testing.