FEB - Far East Battery
Your FEB battery partner in Europe
Battery Partners supplies FEB cylindrical lithium-ion cells across Europe and helps turn the right cell into the right battery solution. From cell selection to custom battery-pack design and production, we support robotics, drones, light electric mobility, smart devices and more.
FEB cells for
your application
Choose from widely used 18650 and 21700 lithium-ion cell formats for efficient battery-pack design
Battery-pack
design
Build a battery pack around your available space, required runtime, current demand and operating environment.
Battery-pack production
Move from an approved pack design to production with a single partner coordinating the process.
FEB Cell range
FEB 21700 68E
Maximum runtime potential in the FEB range
For high-capacity projects that need longer runtime in a standard 21700 cylindrical cell.
- Nominal capacity: 6,500 mAh
- Nominal voltage: 3.6 V
- Energy density: 316 Wh/kg
- Cycle life: 1,000 cycles
- Maximum discharge current: 13,000 mA (2C)
- Operating temperature: -20°C to 60°C
FEB 21700 62E
High capacity for 21700 battery packs
For products that benefit from increased capacity in the 21700 format.
- Nominal capacity: 6,000 mAh
- Nominal voltage: 3.6 V
- Energy density: 300 Wh/kg
- Cycle life: 800 cycles
- Maximum discharge current: 12,000 mA (2C)
- Operating temperature: -20°C to 60°C
FEB 18650 42E
High energy in the compact 18650 format
For designs where pack space is limited and a smaller cylindrical cell is preferred.
- Nominal capacity: 4,000 mAh
- Nominal voltage: 3.6 V
- Energy density: 300 Wh/kg
- Cycle life: 800 cycles
- Maximum discharge current: 8,000 mA (2C)
- Operating temperature: -20°C to 60°C
Specifications are taken from FEB product sheets and are provided as a practical overview. Confirm the latest technical documentation, test conditions and suitability for your application before final pack design or procurement.
Not sure which cell fits your product?
Applications
FEB cylindrical lithium-ion cells are a strong fit wherever runtime, size and weight influence the product design.

Robotics
Give mobile robots more operating time between charges while keeping battery packs compact.

Drones
Support longer flight time and efficient battery-pack design where every gram counts.

Light electric
mobility
Build efficient battery packs for e-bikes, scooters and other light electric vehicles.

Smart home and portable devices
Power connected devices and portable equipment with high-capacity cylindrical cells.
Need a complete battery pack, not only cells?
From FEB cell selection to battery-pack production
Choosing a battery cell is only the first step. We help you define the requirements, choose FEB cells, design the battery pack and move the project towards production.
Tell us what you are building, how it is used and where it will operate.
.We review the needed capacity, current, temperature range, dimensions and target cycle life
We help you identify the FEB 18650 or 21700 option that best matches your project.
Receive the relevant product information and discuss the path towards testing, sample evaluation or a larger requirement.
FAQ about FEB
What is FEB and what do they do?
Far East Battery, a core subsidiary of Far East Smart Energy Co., Ltd. (stock code: 600869) since 2009, is a global new energy battery and ESS service provider. It integrates R & D, production and sales, providing safe, reliable and sustainable energy storage and intelligent energy management services.The company has realized the full – line layout from cells to ESS. Its battery technology R & D and product manufacturing are leading in the industry. The capacity of 18650/21700 cylindrical cells is leading globally, with energy density breaking through 320Wh/kg and 900Wh/L. These cells are widely used in drones, robots, small power, smart home and other fields.The company’s ESS scenarios cover the source & grid – side, commercial & industrial as well as residential use, with more than 10GWh of domestic and international orders delivered. Committed to “building and sharing a safe, green and better life”, it explores the boundaries of technology, helps achieve global carbon neutrality, and strives to be a world – leading battery and ESS service provider.
What are FEB cylindrical lithium-ion cells?
FEB cylindrical lithium-ion cells are rechargeable battery cells in standard cylindrical formats, including 18650 and 21700. They are used to build battery packs for products such as robots, drones, light electric vehicles and smart devices.
What is the difference between 18650 and 21700 battery cells?
The names describe the cell format. An 18650 cell is smaller than a 21700 cell. A 21700 battery cell can offer higher capacity, while the best choice depends on your available space, power demand, thermal design and required runtime.
Which FEB cell is best for a high-capacity battery pack?
The FEB 21700-68E has a nominal capacity of 6,500 mAh and a stated cycle life of 1,000 cycles. It may suit projects that prioritise runtime, but the final choice should be based on the full application requirements and current technical documentation.
Can FEB cells be used in drones and robots?
Yes. FEB product sheets list drones and robots among the application scenarios for the 18650-42E, 21700-62E and 21700-68E cells. The final battery-pack design should always be validated for the specific product.
How do I choose the right cylindrical battery cell?
Begin with the required runtime, maximum current, operating temperature, available space and expected cycle life. Battery Partners can help you compare FEB cells against these requirements.
