Cylindrical 18650 Cell
Rincell RC41
Cylindrical 18650 cell delivering 4.1 Ah capacity with 292 Wh/kg energy density and 12.3 A maximum discharge rate.
Overview
The Rincell INR18650RC41 is a lithium-ion Li-ion cylindrical 18650 cell designed for applications that demand reliable performance. Released in 2024 and with the manufacturer based in United States, this cylindrical 18650 cell delivers 4.1 Ah capacity and 14.15 Wh of energy at a nominal voltage of 3.45 V, with a maximum continuous discharge capability of 12.3 A, making it suitable for general-purpose applications with moderate power requirements.
Key Features
Discharge rate: 12.3 A continuous (3.0 C)
Energy density: 292 Wh/kg
Power density: 875 W/kg
Applications: e-mobility, space, power tools
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Rincell
Model
INR18650RC41
Type
Li-ion
Form factor
Cylindrical 18650
Country of origin
United States
Release year
2024
Nominal voltage
3.45
Energy capacity [Wh]
14.15
Capacity [Ah]
4.1
Gravimetric energy density [Wh/kg]
292
Gravimetric power density [W/kg]
875
Max continuous discharge [A]
12.3
Volume [cm³]
17.53
Mass [g]
48.5
Positive electrode (cathode)
Ni-based (high Ni)
Negative electrode (anode)
Graphite/Si additive
Value
Applications & Use‑Cases
The Rincell INR18650RC41 is well suited to the following applications due to its cylindrical 18650 and balanced performance.
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.
Space: Requires exceptional gravimetric energy density for mass-constrained systems, stable performance across extreme temperature ranges, and proven reliability for mission-critical operations.
Power Tools: Needs sustained high discharge for continuous operation under load, low voltage polarisation to maintain tool performance, and mechanical robustness for demanding work environments.
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 INR18650RC41 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access Rincell RC41 constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not RC41 data.)
Constant Current Temperature
Access Rincell RC41 thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not RC41 data.)
Pulse Power Behaviour
Access Rincell RC41 pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not RC41 data.)
Dynamic Profile Response
Access Rincell RC41 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 RC41 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 Rincell RC41 with similar Cylindrical 18650 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Rincell
Rincell is an American silicon-graphite lithium-ion and sodium-ion cell manufacturer
Rincell is a battery developer headquartered in San Francisco, California, producing cylindrical cells built on silicon-graphite anodes. Its RC series covers the 18650 and 21700 formats in both energy-led and high-rate versions, engineered for fast charging, long cycle life and operation across a wide temperature range, including well below freezing. The company has added high-power sodium-ion cells for applications where cost and low-temperature behaviour outweigh energy density. Rincell is commissioning cell manufacturing in California to supply customers that require domestic production. Its position rests on moving silicon-bearing anodes into commercial volumes in conventional cylindrical formats rather than bespoke ones.
Frequently Asked Questions
What is the capacity and voltage of the Rincell RC41?
The Rincell RC41 has a nominal capacity of 4.1 Ah and a nominal voltage of 3.45 V, providing 14.2 Wh of energy per cell.
What is the maximum continuous discharge capability of the Rincell RC41?
The Rincell RC41 supports continuous discharge rates up to 12.3 A, delivering exceptional power density of 875 W/kg.
How much does the Rincell RC41 weigh and what is its volume?
The cell has a mass of 48.5 g and a volume of 17.53 cm³.
In which industries is the Rincell RC41 commonly used?
The Rincell RC41 is used across e-mobility, energy storage, and consumer electronics, 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.
