Pouch High-Power Cell
BEI MUL03A
Pouch cell delivering 3.1 Ah capacity, 414 Wh/kg energy density and 62 A maximum discharge rate.
Overview
The BEI MUL03A is a high-power Li-ion pouch cell designed for applications that demand sustained high current. Released in 2025 and with the manufacturer based in South Korea, this pouch cell delivers 3.1 Ah capacity and 12 Wh of energy at a nominal voltage of 3.86 V, with a maximum continuous discharge capability of 60 A, making it well suited to high-power systems. At 19.4 C its continuous discharge capability is high for a cell of this capacity class. A gravimetric energy density of 414 Wh/kg puts it at the upper end of the library.
Key Features
Extremely high discharge rate: 60 A continuous (19.4 C)
Energy density: 414 Wh/kg
Power density: 7986 W/kg
Capacity: 3.1 Ah nominal capacity
Applications: drones, motorsports, aviation
Technical Specifications from the Manufacturer
Parameter
Manufacturer
BEI
Model
MUL03A
Type
Li Metal
Form factor
Pouch
Country of origin
South Korea
Release year
2025
Nominal voltage
3.86
Energy capacity [Wh]
12
Capacity [Ah]
3.1
Gravimetric energy density [Wh/kg]
414
Gravimetric power density [W/kg]
7986
Max continuous discharge [A]
60
Volume [cm³]
16.56
Mass [g]
29
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Anode-free
Value
Applications & Use‑Cases
The BEI MUL03A is well suited to the following applications due to its pouch 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 BEI MUL03A across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access BEI MUL03A constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not MUL03A data.)
Constant Current Temperature
Access BEI MUL03A thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not MUL03A data.)
Pulse Power Behaviour
Access BEI MUL03A pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not MUL03A data.)
Dynamic Profile Response
Access BEI MUL03A 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 MUL03A 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 BEI MUL03A with similar Pouch cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
BEI
BEI is a South Korean lithium-metal pouch cell manufacturer
BEI was founded in 2020 and is based in Ansan, South Korea, where it operates a pilot production facility for lithium-metal pouch cells, supported by a research centre in Boston and an office in Tokyo. Its cells replace the conventional graphite anode with lithium metal, using proprietary coatings and non-flammable electrolytes to reach energy densities well beyond mainstream lithium-ion. The company designs for drones, uncrewed aerial systems, robotics and defence platforms, where high energy and high discharge rate are required together. Its anode-free architecture is aimed at thin, light cells that hold performance at low temperature. BEI is among the few producers moving lithium metal toward series manufacture.
Frequently Asked Questions
What is the capacity and voltage of the BEI MUL03A?
The BEI MUL03A has a nominal capacity of 3.1 Ah and a nominal voltage of 3.86 V, providing 12 Wh of energy per cell.
What is the maximum continuous discharge capability of the BEI MUL03A?
The BEI MUL03A supports continuous discharge rates up to 60 A, delivering a power density of 7986 W/kg.
How much does the BEI MUL03A weigh and what is its volume?
The cell has a mass of 29 g and a volume of 16.56 cm³.
In which industries is the BEI MUL03A commonly used?
The BEI MUL03A is used across drones, motorsports, aviation, applications that demand sustained high current.
What is The Voltt and how does it accelerate cell evaluation?
The Voltt holds 500+ verified commercial cell datasheets alongside validated simulation models built from cells characterised in About:Energy's own lab. Engineers screen candidates against their real duty cycle before buying hardware, which cut cell evaluation time by seven months for McMurtry Automotive and reduces evaluation cycles by up to 70%.
What data can be extracted using The Voltt?
Constant-current discharge curves at multiple C-rates, DC internal resistance against state of charge and temperature, pulse power maps, thermal response, and full mission-profile simulation with user-defined pack configurations. Models are available as equivalent circuit, thermal, physics-based and degradation formats, exportable for use in MATLAB, Simulink and Python workflows.
