Cylindrical 21700 High-Power Cell
EVE Energy 25HL
Cylindrical 21700 cell delivering 2.3 Ah capacity with 133 Wh/kg energy density and 124 A maximum discharge rate.
Overview
The EVE Energy 25HL is a high-power lithium-ion cylindrical 21700 cell designed for applications that demand very high continuous discharge rates. Released in 2019 and with the manufacturer based in China, this cylindrical 21700 cell delivers 2.3 Ah capacity and 8.4 Wh of energy at a nominal voltage of 3.65 V, with a maximum continuous discharge capability of 124 A, making it well suited to high-power systems operating under aggressive discharge profiles. With a continuous discharge rate of 54 C, the 25HL is among the highest-rated cells for peak power delivery in the Voltt library.
Key Features
Extremely high discharge rate: 124 A continuous (53.9 C)
Charging rate: 3.0 C charging rate
Energy density: 133 Wh/kg
Power density: 7184 W/kg
Applications: aviation, motorsports, drones
Technical Specifications from the Manufacturer
Parameter
Manufacturer
EVE Energy
Model
25HL
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
China
Release year
2019
Nominal voltage
3.65
Energy capacity [Wh]
8.4
Capacity [Ah]
2.3
Gravimetric energy density [Wh/kg]
133
Gravimetric power density [W/kg]
7184
Max continuous discharge [A]
124
Volume [cm³]
24.65
Mass [g]
63
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Value
Applications & Use‑Cases
The EVE Energy 25HL is well suited to the following applications due to its cylindrical 21700 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 EVE Energy 25HL across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
The EVE Energy 25HL constant-current plots reveal voltage behaviour under steady loads, ideal for analysing efficiency.
Constant Current Temperature
The EVE Energy 25HL constant-current plots reveal temperature behaviour under steady loads, ideal for analysing thermal response.
Pulse Power Behaviour
The EVE Energy 25HL pulse power map evaluates short-duration load responses, allowing engineers to determine the maximum available power as a function of state of charge and temperature.
Dynamic Profile Response
The EVE Energy 25HL mission-profile plots simulate real-world duty cycles, showing how the cell manages dynamic power demands and temperature changes.
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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 EVE Energy 25HL with similar Cylindrical 21700 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
EVE Energy
EVE Energy is a leading Chinese lithium battery manufacturer
EVE Energy is a leading Chinese battery manufacturer producing advanced lithium-ion cells for electric vehicles, energy storage, and consumer applications. Their 21700 cylindrical cells combine high energy density with excellent power capabilities, meeting demanding automotive specifications. EVE's extensive product portfolio includes LFP and NCM chemistry variants optimized for different application requirements. With state-of-the-art manufacturing facilities and strong R&D capabilities, EVE supplies major Chinese EV brands and international markets. The company's focus on sustainable battery technology and manufacturing excellence has established them as a key supplier in Asia's electric vehicle ecosystem, with growing presence in European and North American markets.
Frequently Asked Questions
What is the capacity and voltage of the EVE Energy 25HL?
The EVE Energy 25HL has a nominal capacity of 2.3 Ah and a nominal voltage of 3.65 V, providing 8.4 Wh of energy per cell.
What is the maximum continuous discharge capability of the EVE Energy 25HL?
The EVE Energy 25HL supports continuous discharge rates up to 124 A, delivering a power density of 7184 W/kg.
How much does the EVE Energy 25HL weigh and what is its volume?
The cell has a mass of 63 g and a volume of 24.65 cm³.
In which industries is the EVE Energy 25HL commonly used?
The EVE Energy 25HL 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 is About Energy's digital cell simulation platform that models electrochemical and thermal performance, reducing evaluation time by up to 70% compared to laboratory testing.
What data can be extracted using The Voltt?
Engineers can simulate and visualise voltage, temperature, and power responses under constant-current or mission-profile conditions, generating detailed discharge plots to support accurate cell comparison and validation.
