Cylindrical 21700 Cell
EVE Energy 50E
Cylindrical 21700 cell delivering 5 Ah capacity with 257 Wh/kg energy density and 15 A maximum discharge rate.
Overview
The EVE Energy INR21700-50E is a lithium-ion Li-ion cylindrical 21700 cell designed for applications that demand reliable performance. Released in 2023 and manufactured in China, this cylindrical 21700 cell delivers 5 Ah capacity and 18.25 Wh of energy at a nominal voltage of 3.65 V, with a maximum continuous discharge capability of 15 A, making it suitable for general-purpose applications with moderate power requirements.
Key Features
Discharge rate: 15 A continuous (3.0 C)
Energy density: 257 Wh/kg
Power density: 771 W/kg
Applications: aviation, motorsports, e-mobility
Technical Specifications from the Manufacturer
Parameter
Manufacturer
EVE Energy
Model
INR21700-50E
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
China
Release year
2023
Nominal voltage
3.65
Energy capacity [Wh]
18.25
Capacity [Ah]
5
Gravimetric energy density [Wh/kg]
257
Gravimetric power density [W/kg]
771
Max continuous discharge [A]
15
Volume [cm³]
24.93
Mass [g]
71
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Graphite
Value
Applications & Use‑Cases
The EVE Energy 50E is well suited to the following applications due to its cylindrical 21700 and balanced 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.
E-Mobility: Requires balanced energy and power density for range and acceleration, high cycle life for daily use, and robust calendar life to ensure long-term reliability.
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 50E across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access EVE Energy 50E constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not 50E data.)
Constant Current Temperature
Access EVE Energy 50E thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not 50E data.)
Pulse Power Behaviour
Access EVE Energy 50E pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not 50E data.)
Dynamic Profile Response
Access EVE Energy 50E 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 50E 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 EVE Energy 50E 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 Chinese lithium-ion cell manufacturer producing cylindrical and prismatic formats
EVE Energy was founded in 2001 in Huizhou, China, and produces lithium-ion cylindrical and prismatic cells alongside a long-established primary lithium business. Its range covers lithium iron phosphate and nickel-based chemistries, with cylindrical 21700 and large-format prismatic cells serving electric vehicles, stationary storage, power tools and consumer products. The company operates plants across several Chinese provinces and has added capacity in Hungary, Malaysia and the United States to supply customers closer to their end markets. Its cylindrical range spans high-power and energy-led variants built on shared production lines. EVE is one of the broadest Chinese suppliers by application, rather than one concentrated on a single market.
Frequently Asked Questions
What is the capacity and voltage of the EVE Energy 50E?
The EVE Energy 50E has a nominal capacity of 5.0 Ah and a nominal voltage of 3.65 V, providing 18.2 Wh of energy per cell.
What is the maximum continuous discharge capability of the EVE Energy 50E?
The EVE Energy 50E supports continuous discharge rates up to 15 A, delivering exceptional power density of 771 W/kg.
How much does the EVE Energy 50E weigh and what is its volume?
The cell has a mass of 71 g and a volume of 24.93 cm³.
In which industries is the EVE Energy 50E commonly used?
The EVE Energy 50E is used across e-mobility, energy storage, and general-purpose applications, applications that demand reliable performance and balanced specifications.
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.
