EVE 3.2V 668Ah LF668 LiFePO4 Battery Cell - Brand New Grade A with QR Code

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Product Information:

EVE 668Ah LiFePO4 Battery Cell – Grade A for Energy Storage

Upgrade your energy system with the EVE 668Ah LiFePO4 cell, engineered for maximum performance, safety, and reliability. Built with cutting-edge lithium iron phosphate (LiFePO4) technology, this high-capacity cell is the perfect choice for home energy storage systems, solar power solutions, and large-scale off-grid projects.

Key Features & Benefits:

• 🔋 Ultra-High Capacity – 668Ah
  Store more energy in a single cell, reducing the number of cells required for large battery packs and lowering system complexity.

• ⚡ Long Cycle Life – 8,000+ Cycles
  Enjoy over 10 years of reliable use with consistent performance and low degradation, even under frequent charge/discharge cycles.

• 🛡️ Superior Safety with LiFePO4 Chemistry
  Stable structure with strong thermal and chemical stability, ensuring safe operation without risk of thermal runaway.

• ✅ Grade A Quality, Brand-New with QR Code
  100% authentic EVE cells, matched for voltage and capacity, guaranteeing excellent consistency in battery pack assembly.

• 🌍 Perfect for Renewable Energy Storage
  Ideal for solar energy storage systems, backup power solutions, RVs, marine, and off-grid living.

• 🔧 Flexible Applications
  Widely compatible with DIY battery builds, residential ESS (Energy Storage Systems), and commercial-scale storage projects.

Specification

Manufacturer: EVE

Model No: EVE 668Ah

Typical Voltage: 3.2V

Typical Capacity: 668Ah

AC Impedance Resistance: ≤0.10mΩ

Life Cycle: 8000 cycles

Standard Charge/Discharge Current: 0.5C / 0.5C

Standard Charge Cut-off Voltage: 3.65V

Standard Discharge Cut-off Voltage: 2.5V

Continuous Charge/Discharge Current: 0.5C / 0.5C

Internal Resistance: 0.10 ± 0.05mΩ

Recommended SOC Window: 10% ~ 90%

Charging Temperature: 0℃ ~ 60℃

Discharging Temperature: -30℃ ~ 60℃

Self-Discharge Rate: ＜3%

Short-term Storage (<1 month): -20℃ ~ 45℃

Long-term Storage (<1 year): 0℃ ~ 35℃

Storage Humidity: ＜95%

Cell Dimension: 352.3 × 71.7 × 205 mm

Cell Weight: 11.5 kg

Certifications:  MSDS, UN38.3, CE

Warranty: 5 Years

Important Installation Notice:

To avoid contact resistance, the following points must be observed:

✔️ Thoroughly clean the battery terminals with ethanol or pure alcohol to remove oxide layers.
✔️ The terminals must not be touched with greasy fingers – they must be absolutely grease-free and clean.
✔️ Ideally, the contacts should be cleaned with a brass brush or fine sandpaper (grit 1000).
✔️ The contact surfaces of the cell connectors must also be carefully cleaned.
❌ The use of assembly greases, copper paste, or similar substances must be strictly avoided – they cause contact resistance, which can lead to heat generation and measurement errors during operation. As a result, the full capacity of the cells cannot be utilized.

🔧 Tighten the M8 screws with a torque of 8 Nm.

NOTE

We recommend a maximum discharge down to 2.70 V and a maximum charge of each cell up to 3.50 V.

Warranty

The warranty period is 5 years from the date you receive.

We only replace new cell for free due to the failure of manufacturing.

Before the shipment, we will detect the cell voltage/resistance/appearance and other issues. we can only ensure that single cell is good before the shipment.

When arrival you can test the cells within 1 week, if you found problems please contact us for refund or replace. Any return behavior buyers need to be responsible for shipping fee.

Remark

Please read carefully all the description before taking orders, the battery is suitable for DIY lovers with experience, people who are not familiar with the safe use of lithium battery knowledge, please go to our shop to buy the finished product.

DIY battery pack must get the cells balanced (same voltage ) before assembly.
And we don’t accept refund for buyers who don’t know how to assembled or unbalanced assembly.

Please use the correct BMS during assembly. We don’t accept refund for the problem caused during assembly process or after the assembly. Such as not use the BMS, the BMS connected to the wrong wire lead to battery damage, charger failure, the assembly error or unbalanced assembly, etc.

Before assembling, please make sure use the same capacity cell and use the same brand of the cell. It is forbidden to mix cells with different capacity and brand in the same battery system. Otherwise, we will not be responsible for quality assurance.

 

Application

Solar energy storage, solar power system, UPS supply, Engine starting battery, Electric bicycle/motorcycle/scooter, Golf trolley/carts, RV, EV, Caravan So on.

📧 Contact us : 

More any questions about the BetterESS Power Battery? 
Email:  service@better-ess.com