Cylindrical 21700 High-Power Cell
FEB 50H
Cylindrical 21700 cell delivering 5 Ah capacity, 247 Wh/kg energy density and 60 A maximum discharge rate.
Overview
The FEB 50H is a high-power Li-ion cylindrical 21700 cell designed for applications that demand sustained high current. with the manufacturer based in China, this cylindrical 21700 cell delivers 5 Ah capacity and 18 Wh of energy at a nominal voltage of 3.6 V, with a maximum continuous discharge capability of 60 A, making it well suited to high-power systems. At 12.0 C its continuous discharge capability is high for a cell of this capacity class. Among the 21700 cylindrical cells in the About:Energy battery library, the FEB 50H ranks 19th of 108 for maximum continuous discharge. Its 60 A compares with a 21700 cylindrical median of 35 A.
Key Features
Extremely high discharge rate: 60 A continuous (12.0 C)
Energy density: 247 Wh/kg
Power density: 2,959 W/kg
Capacity: 5 Ah nominal capacity
Applications: drones, motorsports, aviation
Technical Specifications from the Manufacturer
Parameter
Manufacturer
FEB
Model
21700-50H
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
China
Release year
Nominal voltage
3.6
Energy capacity [Wh]
18
Capacity [Ah]
5
Gravimetric energy density [Wh/kg]
247
Gravimetric power density [W/kg]
2959
Max continuous discharge [A]
60
Volume [cm³]
Mass [g]
73
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Value
Applications & Use‑Cases
The FEB 50H is well suited to the following applications due to its 21700 format and high power performance.
Drones: Demands high gravimetric power density for thrust and payload capacity, rapid current response for flight control, and stable voltage delivery across dynamic flight profiles.
Motorsports: Demands sustained high discharge under competitive load profiles, rapid transient response for acceleration, and thermal stability to maintain performance during race conditions.
Aviation: Requires high specific energy for extended flight duration, high power-to-weight ratio for climb performance, and reliable operation across wide temperature ranges at altitude.
General Applications: Suitable for applications requiring reliable lithium-ion performance with proven cycle life, consistent capacity delivery, and operational safety across diverse use cases.
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Performance & Model Data
Below are modelled performance metrics for the FEB 50H across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access FEB 50H constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not 50H data.)
Constant Current Temperature
Access FEB 50H thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not 50H data.)
Pulse Power Behaviour
Access FEB 50H pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not 50H data.)
Dynamic Profile Response
Access FEB 50H mission profile simulations in Voltt to prove the pack holds up over a real duty cycle before you build it. (Chart shown is illustrative, not 50H data.)
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Case Studies
See how we helped McMurtry reduce cell evaluation time by 70% through data driven testing and modelling.
Motorsports
McMurtry Automotive: Faster cell evaluation
McMurtry Automotive used The Voltt and validated cell models to evaluate the transition from the Molicel P45B to P50B during early pack concept development.
Side by side modelling enabled rapid comparison of electrical and thermal behaviour, avoiding lengthy physical test campaigns. This approach reduced cell evaluation time by seven months, allowing the team to lock in cell selection and pack assumptions earlier while lowering technical risk and accelerating vehicle development.
Comparison with Related Cells
Compare the FEB 50H with similar Cylindrical 21700 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
FEB
FEB is a Chinese cylindrical lithium-ion cell manufacturer
Far East Battery, trading as FEB, was founded in 2009 and is a core subsidiary of the listed Far East Smart Energy group. The company develops and manufactures cylindrical lithium-ion cells, modules and complete pack systems, with the 18650 and 21700 formats forming the backbone of its catalogue. FEB serves electric vehicles, stationary energy storage, electric two-wheelers, power tools and consumer electronics, giving it volume across several high-turnover segments. It has pushed mass-produced 21700 capacity upward in successive steps, releasing higher-capacity variants ahead of much of the market while holding the same cell dimensions. Its position rests on capacity records within established formats rather than novel chemistries.
Frequently Asked Questions
What is the capacity and voltage of the FEB 50H?
The FEB 50H has a nominal capacity of 5 Ah and a nominal voltage of 3.6 V, providing 18 Wh of energy per cell.
What is the maximum continuous discharge capability of the FEB 50H?
The FEB 50H supports continuous discharge rates up to 60 A, delivering a power density of 2,959 W/kg.
How much does the FEB 50H weigh and what is its volume?
Full mass and volume data for this cell is being added.
In which industries is the FEB 50H commonly used?
The FEB 50H is used across drones, motorsports, aviation, applications that demand sustained high current.
How does the FEB 50H compare with the Ampace JP50?
Comparing the FEB 50H with the Ampace JP50: capacity 5 Ah against 5 Ah; maximum continuous discharge 60 A against 60 A; energy density 247 Wh/kg against 249 Wh/kg; mass 73 g against 72 g. Both datasheets can be compared side by side in The Voltt.
What chemistry and format is the FEB 50H?
The FEB 50H is a cylindrical 21700 cell with a Ni-based cathode. It has a nominal voltage of 3.6 V. Its full datasheet is free to view in The Voltt.
