CALB is recognized as a leading research and manufacturing company in the battery industry. The group holds numerous intellectual properties that make their battery products popular in global markets. Over the years, CALB has shipped products worldwide, contributing to green power utilization and reducing CO2 emissions.

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

Intellectual Property: 100% coverage of core technology intellectual property rights; patents applied for in China, United States, Europe and other regions; recipient of China Excellent Patent Award; certified by Jiangsu Provincial Intellectual Property Management Standardization; recognized as Henan Provincial Intellectual Property Application Demonstration Enterprise.

Scientific Achievements: 22 research projects have passed scientific and 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: 0.5C charge to 3.65V, 0.5C discharge to 2.5V as a cycle. After 9000 cycles, 80% capacity remains.

Real Capacity: 300-304ah

The 280ah Lifepo4 lithium battery is a favorite among DIY users for solar energy storage and off-grid backup applications. Ideal for:

• Caravan and camp caravan
• Golf carts
• Forklifts
• Electrical bikes and motorbikes
• Solar energy storage systems
• Home energy storage systems (Powerwall)
• RV applications

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

• Safety: Safest lithium battery technology with built-in PCM/PCB protection, non-flammable and non-explosive
• Eco-Friendly: Clean green energy with no toxic materials
• Long Life Cycle: 80% capacity remains after 500 deep cycles
• No Memory Effect: Highly efficient charging anytime without capacity reduction
• Wide Temperature Range: Operation temperature: -20~55°C
• High Temperature Performance: Excellent performance at high temperatures with high temperature resistance
• Low Self-Discharge: Less than 3% monthly self-discharge rate
• Deep Cycle Capability: More than 2000 cycles lifespan, significantly longer than lead acid batteries

When working with electrical equipment for DIY projects, follow these safety precautions:

• Always wear safety glasses and gloves when appropriate
• Ensure cells are within operating temperature range prior to use
• Do not use cells that are punctured, damaged, or leaking
• Provide adequate protection to cells during assembly and use
• Dispose of batteries properly at recycling facilities
• Do not submerge in water or expose to direct heat, extreme temperatures, or fire
• Prevent harsh impacts or extreme vibrations that can cause damage

Secure packaging with foams and UN-certified cartons for safe transportation.

Note: We ship to other countries - contact us for details. We prioritize honesty and reliability over cheap but potentially unreliable shipping methods.

USA Shipping: By sea + Express (DDP, Tax free) - ETD: 5-8 days, ETA: 25-35 days after sailing

EU Shipping: By railway + Express (DDP, Tax free) - ETD: 5-8 days, ETA: 30-45 working days after shipping (excluding Switzerland, Romania)

Why top balancing LiFePO4 cells is essential before building battery packs:

Regardless of cell grade (A, B, C) or condition (new/used), initial balancing is crucial to bring all cells to the same state of charge. Voltage readings alone are unreliable for determining state of charge in LiFePO4 chemistry due to their flat charge/discharge curve.

Importance of Initial Balance:

• Ensures accurate capacity test results
• Prevents premature BMS triggering due to cell voltage variations
• Identifies problematic cells with high internal resistance
• Natural parallel balancing can take weeks or months
• Manual top balancing is recommended for large battery banks or varying cell conditions

For optimal performance and longevity, perform manual top balancing regardless of initial voltage readings, especially when dealing with large loads or capacity balancing requirements.