Cylindrical 18650 High-Power Cell
Molicel P28B
Cylindrical 18650 cell delivering 2.8 Ah capacity with 210 Wh/kg energy density and 40 A maximum discharge rate.
Overview
The Molicel P28B is a high-power lithium-ion cylindrical 18650 cell designed for applications that demand very high continuous discharge rates. Released in 2022 and with the manufacturer based in Taiwan, this cylindrical 18650 cell delivers 2.8 Ah capacity and 10.08 Wh of energy at a nominal voltage of 3.6 V, with a maximum continuous discharge capability of 40 A, making it well suited to high-power systems operating under aggressive discharge profiles.
Key Features
Extremely high discharge rate: 40 A continuous (14.3 C)
Charging rate: 3.0 C charging rate
Energy density: 210 Wh/kg
Power density: 3000 W/kg
Applications: aviation, motorsports, drones
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Molicel
Model
INR-18650-P28B
Type
Li-ion
Form factor
Cylindrical 18650
Country of origin
Taiwan
Release year
2022
Nominal voltage
3.6
Energy capacity [Wh]
10.08
Capacity [Ah]
2.8
Gravimetric energy density [Wh/kg]
210
Gravimetric power density [W/kg]
3000
Max continuous discharge [A]
40
Volume [cm³]
17.72
Mass [g]
48
Positive electrode (cathode)
Negative electrode (anode)
Value
Applications & Use‑Cases
The Molicel P28B is well suited to the following applications due to its cylindrical 18650 form factor and high power performance.
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.
Motorsports: Demands sustained high discharge under competitive load profiles, rapid transient response for acceleration, and thermal stability to maintain performance during race conditions.
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.
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 Molicel P28B across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access Molicel P28B constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not P28B data.)
Constant Current Temperature
Access Molicel P28B thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not P28B data.)
Pulse Power Behaviour
Access Molicel P28B pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not P28B data.)
Dynamic Profile Response
Access Molicel P28B 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 P28B 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 Molicel P28B with similar Cylindrical 18650 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Molicel
Molicel is a Taiwanese manufacturer of high-power cylindrical lithium-ion cells
Molicel is the cell brand of E-One Moli Energy, a Taiwanese manufacturer whose technology traces back to lithium battery research begun in Canada in the 1970s. The company produces cylindrical 18650 and 21700 cells engineered for high continuous discharge, fast charge acceptance and thermal stability under sustained load. Its P series power cells and higher-capacity energy variants are used in eVTOL aircraft, motorsport and performance vehicles, power tools and aerospace systems, where discharge rate rather than energy density sets the design limit. Manufacturing is based in Taiwan with a long-standing Canadian research presence. Molicel is the reference supplier for many programmes that cycle hard and frequently.
Frequently Asked Questions
What is the capacity and voltage of the Molicel P28B?
The Molicel P28B has a nominal capacity of 2.8 Ah and a nominal voltage of 3.6 V, providing 10.08 Wh of energy per cell.
What is the maximum continuous discharge capability of the Molicel P28B?
The Molicel P28B supports continuous discharge rates up to 40 A, delivering a power density of 3000 W/kg.
How much does the Molicel P28B weigh and what is its volume?
The cell has a mass of 48 g and a volume of 17.72 cm³.
In which industries is the Molicel P28B commonly used?
The Molicel P28B is used across aviation, motorsports, drones, applications that demand very high power output and thermal management under extreme discharge.
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.
