Cylindrical 18650 Cell
LG Chem MJ1
Cylindrical 18650 cell delivering 3.5 Ah capacity with 260 Wh/kg energy density and 10 A maximum discharge rate.
Overview
The LG Chem INR18650-MJ1 is a lithium-ion Li-ion cylindrical 18650 cell designed for applications that demand reliable performance. Released in 2014 and manufactured in South Korea, this cylindrical 18650 cell delivers 3.5 Ah capacity and 12.72 Wh of energy at a nominal voltage of 3.635 V, with a maximum continuous discharge capability of 10 A, making it suitable for general-purpose applications with moderate power requirements.
Key Features
Discharge rate: 10 A continuous (2.9 C)
Energy density: 260 Wh/kg
Power density: 742 W/kg
Applications: e-mobility, space, power tools
Technical Specifications from the Manufacturer
Parameter
Manufacturer
LG Chem
Model
INR18650-MJ1
Type
Li-ion
Form factor
Cylindrical 18650
Country of origin
South Korea
Release year
2014
Nominal voltage
3.635
Energy capacity [Wh]
12.72
Capacity [Ah]
3.5
Gravimetric energy density [Wh/kg]
260
Gravimetric power density [W/kg]
742
Max continuous discharge [A]
10
Volume [cm³]
17.28
Mass [g]
49
Positive electrode (cathode)
Ni-based (high Ni)
Negative electrode (anode)
Graphite/Si additive
Value
Applications & Use‑Cases
The LG Chem INR18650-MJ1 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 LG Chem INR18650-MJ1 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access LG Chem MJ1 constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not MJ1 data.)
Constant Current Temperature
Access LG Chem MJ1 thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not MJ1 data.)
Pulse Power Behaviour
Access LG Chem MJ1 pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not MJ1 data.)
Dynamic Profile Response
Access LG Chem MJ1 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 MJ1 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 LG Chem MJ1 with similar Cylindrical 18650 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
LG Chem
LG Energy Solution is a South Korean manufacturer producing cylindrical, pouch and prismatic lithium-ion cells
LG Energy Solution, formerly the battery division of LG Chem, is headquartered in Seoul and is one of the world's largest lithium-ion cell manufacturers. It produces cylindrical 18650 and 21700 cells alongside pouch and prismatic formats, supplying passenger vehicles, energy storage systems, power tools and consumer electronics. Its cylindrical range uses high-nickel NCM and NCMA cathode chemistry, with capacity and rate variants distinguished by model suffix. Manufacturing spans South Korea, China, Poland and the United States, including joint ventures with automotive partners. Its position rests on supplying most major vehicle manufacturers at scale while holding the quality systems that automotive qualification demands.
Frequently Asked Questions
What is the capacity and voltage of the LG Chem MJ1?
The LG Chem MJ1 has a nominal capacity of 3.5 Ah and a nominal voltage of 3.635 V, providing 12.7 Wh of energy per cell.
What is the maximum continuous discharge capability of the LG Chem MJ1?
The LG Chem MJ1 supports continuous discharge rates up to 10 A, delivering exceptional power density of 742 W/kg.
How much does the LG Chem MJ1 weigh and what is its volume?
The cell has a mass of 49 g and a volume of 17.28 cm³.
In which industries is the LG Chem MJ1 commonly used?
The LG Chem MJ1 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.
