LG INR18650 MJ1 is an 18650 cylindrical cell made by LG, NMC811 cathode and graphite anode with silicon.
- 259.6Wh/kg at 23°C
- 266Wh/kg 
- 736Wh/litre at 23°C
- 720Wh/litre 
Designed to meet
- Transport: UN38.3
- Nominal Capacity = 3.5Ah
- Nominal Voltage = 3.635V
- Nominal Energy = 12.72Wh
- Charge cutoff voltage = 4.2V
- Maximum charge rate = 1.0 C (3400mA)
- Temperature limits = 0° to 45°C
- Cutoff voltage = 2.5V
- Maximum discharge current = 10A
- Maximum pulse discharge = 18.9A
Maximum current was based on 50% SoC nominal voltage, cutoff at 2.5V and DCIR of 60mΩ
- DCIR = 33mΩ
- Temperature limits = -20° to 60°C
- Storage temperature
- 1 month -20 ~ 60℃
- 3 month -20 ~ 45℃
- 1 year -20 ~ 20℃
- Cycle life = 400 cycles 
- see detail ageing test conclusions from EU project
- Diameter: 18.4 +0.1 / -0.3 mm (Max. 18.5mm)
- hole through centre of jelly roll, diameter ~2mm
- H: 65.0 ±0.2mm (Max. 65.2mm)
- Volume: 0.0172litres
- Maximum = 49.0g
- Average = 46.8g
- nickel (Ni)-rich lithium nickel manganese cobalt oxide (811)
- length = 610mm
- width = 59mm
- thickness = 0.16mm
- graphite based with a presence of Si
- Silicon content ~ 3.5wt% 
- length = 660mm
- width = 60mm
- thickness = 0.17mm
- graphite based with a presence of Si
- wall thickness = 0.19mm
- average = 0.165mm 
- wall thickness = 0.19mm
The cell mass is given as a maximum of 49.0g on the specification sheet.
Batemo quote 46.7g for the cell mass. NASA have looked at using this cell in manned space missions, this data table  gives a bit more data and a mass of 46.8g
Knowing the outer and inner diameter of the spiral along with it’s thickness we can calculate the length of the material to create it.
D is the inner diameter of the cylindrical can.
The inner diameter is that of the mandrel around which we wind the spiral.
- Maximum discharge current =
- Short circuit current = A
- ACIR ≤ 40 mΩ at 1kHz
- DCIR = 60mΩ 
- The specification sheet  shows a significant capacity temperature dependence
- The EVERLASTING EU project used this cell for their ageing studies and conducted extensive testing. Their conclusions from their report  are shown below:
- The ageing stress factor investigated in this study are:
- the environmental temperature during life cycling and during storage where it was shown that high (45°C) and very low (0°C) temperatures increases the ageing rate. This was observed for both calendar and life cycling tests.
- the cycling C-rate where the charge and discharge currents were varied. It was shown that high discharge rate (3C) led the cell to its EOL in less than 600 equivalent cycles.
- the cycling window where the two most common ranges were used i.e. 70 to 90%SOC (corresponding to home to work daily trip) and 10 to 90%SOC. This study shows that cycling in a wide SOC window decreases the cells’ lifetime.
- the storage SOC level. This test simulates the effect of car parking on the cell lifetime. It was shown that high (45°C) and low (0°C) temperatures increases the cell’s ageing rate. And low SOC (10%) has the lowest degradation effect compared to 70% and 90%SOC. However it was shown that compared the cells stored at 90%SOC, the ones stored at 70%SOC has a higher degradation rate. Additional ageing tests were started to better understand this behaviour rand will be reported in later reports and SCI papers.
- Gas Pressure
- Hemmerling et al  show the gas pressure versus SoC for an LG INR18650 MJ1 cell during a stepped C/3 charge cycle with a relaxation time.
Independent safety tests of the cell.
- Thermal Runaway
- energy released = 73.8kJ
- 80% of energy released through ejected material and gases
|External Short Circuit||No explode, No fire||100mΩ-wire for 1 hour (UL1642)|
|Overcharge||No explode, No fire||UL1642|
|Forced Discharge||No explode, No fire||discharged at 0.2C to 250% of the minimum capacity.|
|Crush||No explode, No fire||UL1642|
|Impact||No explode, No fire||UL1642|
|Vibration||No Leakage||90 minutes per axis (x, y, z) excursion of 0.8mm, 10Hz to 55Hz and sweep of 1Hz change per minute|
|External Heat||No explode, No fire||UL1642|
|Drop||No leakage, No temperature rise|
Please let us know of specific uses of this cell.
- Performance of Commercial High Energy and High Power Li-ion Cells in Jovian Missions Encountering High Radiation Environments, NASA
In terms of key metrics has a good energy density and ok power density. We would class this as more of a energy cell.
Note: if you have tested this cell independently and able to share data please contact us email@example.com
- EVERLASTING = Electric Vehicle Enhanced Range, Lifetime And Safety Through INGenious battery management D2.3 – Report containing aging test profiles and test results February 2020,
- Rechargeable Lithium Ion Battery Model : INR18650 MJ1 3500mAh, LG Chem
- Review and Independent Testing https://lygte-info.dk
- T. M. M. Heenan, A. Jnawali, M. D. R. Kok, T. G Tranter, C. Tan, A. Dimitrijevic, R. Jervis, D. J. L. Brett and P. R. Shearing, An Advanced Microstructural and Electrochemical Datasheet on 18650 Li-Ion Batteries with Nickel-Rich NMC811 Cathodes and Graphite-Silicon Anodes, 2020 J. Electrochem. Soc. 167
- Open source raw data on the MJ1 from this paper is available here: https://rdr.ucl.ac.uk/authors/Thomas_Heenan/6783557
- Eric Darcy, Passively Thermal Runaway Propagation Resistant Battery Module that Achieves > 190 Wh/kg, Sustainable Aircraft Symposium, Redwood City, CA, May 6-7, 2016
- Eric Darcy, Safe, High Power / Voltage Battery Module Design Challenges, Battery Show Europe, Stuttgart, Germany, 7-9 May 2019
- Performance of Commercial High Energy and High Power Li-Ion Cells in Jovian Missions Encountering High Radiation Environments, NASA Battery Workshop, November 19-21, 2019
- Statistical Characterization of 18650 – Format Lithium – Ion Cell Thermal Runaway Energy Distributions, NASA Aerospace Battery Workshop, Huntsville, Alabama, 11/14/2017 to 11/16/2017
- Natalie Anderson, Minh Tran, and Eric Darcy, 18650 Cell Bottom Vent: Preliminary Evaluation into its Merits for Preventing Side Wall Rupture, NASA-JSC, S&T Meeting, San Diego, CA, 7 Dec 2016
- Jessica Hemmerling, Johannes Schäfer, Tobias Jung, Tina Kreher, Marco Ströbel, Carola Gassmann, Jonas Günther, Alexander Fill, Kai Peter Birke, Investigation of internal gas pressure and internal temperature of cylindrical Li-ion cells to study thermodynamical and mechanical properties of hard case battery cells, Journal of Energy Storage, Volume 59, 2023