Cylindrical 21700 High-Power Cell
Rincell RC58
Cylindrical 21700 cell delivering 5.8 Ah capacity, 292 Wh/kg energy density and 17.4 A maximum discharge rate.
Overview
The Rincell RC58 is a high-power Li-ion cylindrical 21700 cell designed for applications that demand sustained high current. Released in 2026 and with the manufacturer based in United States, this cylindrical 21700 cell delivers 5.8 Ah capacity and 20.01 Wh of energy at a nominal voltage of 3.45 V, with a maximum continuous discharge capability of 17.4 A, making it well suited to high-power systems.
Key Features
High discharge rate: 17.4 A continuous (3.0 C)
Energy density: 292 Wh/kg
Power density: 876 W/kg
Capacity: 5.8 Ah nominal capacity
Applications: aviation, e-mobility, motorsports
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Rincell
Model
INR21700RC58
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
United States
Release year
2026
Nominal voltage
3.45
Energy capacity [Wh]
20.01
Capacity [Ah]
5.8
Gravimetric energy density [Wh/kg]
292
Gravimetric power density [W/kg]
876
Max continuous discharge [A]
17.4
Volume [cm³]
25.49
Mass [g]
68.5
Positive electrode (cathode)
Negative electrode (anode)
Value
Applications & Use‑Cases
The Rincell RC58 is well suited to the following applications due to its 21700 format 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.
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.
Motorsports: Demands sustained high discharge under competitive load profiles, rapid transient response for acceleration, and thermal stability to maintain performance during race conditions.
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 Rincell RC58 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
The Rincell RC58 constant-current plots reveal voltage behaviour under steady loads, ideal for analysing efficiency.
Constant Current Temperature
The Rincell RC58 constant-current plots reveal temperature behaviour under steady loads, ideal for analysing thermal response.
Pulse Power Behaviour
The Rincell RC58 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 Rincell RC58 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 Rincell RC58 with similar Cylindrical 21700 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Rincell
Rincell is a battery manufacturer specializing in cylindrical lithium-ion cells
Rincell is a battery technology company developing advanced lithium-ion cells with emphasis on performance optimization for electric mobility applications. Their 21700 cylindrical format cells incorporate innovative electrode designs and material formulations aimed at improving energy density and charging characteristics. Rincell's approach combines research-driven cell development with manufacturing partnerships to bring high-performance battery solutions to market. The company targets applications where battery performance directly impacts vehicle range and customer experience. Rincell's engineering team focuses on pushing technological boundaries in lithium-ion cell design while maintaining safety and reliability standards. As battery technology continues evolving, Rincell positions itself as an innovation-focused player developing next-generation cylindrical cell solutions for demanding automotive applications.
Frequently Asked Questions
What is the capacity and voltage of the Rincell RC58?
The Rincell RC58 has a nominal capacity of 5.8 Ah and a nominal voltage of 3.45 V, providing 20.01 Wh of energy per cell.
What is the maximum continuous discharge capability of the Rincell RC58?
The Rincell RC58 supports continuous discharge rates up to 17.4 A, delivering a power density of 876 W/kg.
How much does the Rincell RC58 weigh and what is its volume?
The cell has a mass of 68.5 g and a volume of 25.49 cm³.
In which industries is the Rincell RC58 commonly used?
The Rincell RC58 is used across aviation, e-mobility, motorsports, applications that demand sustained high current.
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.
