Cylindrical 18650 Cell
Panasonic UR18650AAN
High-energy cylindrical 18650 cell delivering 2.25 Ah capacity with 149 Wh/kg energy density and 1.5 A maximum discharge rate.
Overview
The Panasonic UR18650AAN is a lithium-ion cylindrical 18650 cell designed for applications that demand high energy density and consistent capacity delivery. Released in 2016 and with the manufacturer based in Japan, this cylindrical 18650 cell delivers 2.25 Ah capacity and 8.21 Wh of energy at a nominal voltage of 3.65 V, with a maximum continuous discharge capability of 1.5 A, making it well suited to energy-focused applications requiring extended runtime.
Key Features
Discharge rate: 1.5 A continuous (0.7 C)
Energy density: 149 Wh/kg
Power density: 100 W/kg
Applications: aviation, e-mobility, energy storage
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Panasonic
Model
UR18650AAN
Type
Li-ion
Form factor
Cylindrical 18650
Country of origin
Japan
Release year
2016
Nominal voltage
3.65
Energy capacity [Wh]
8.2125
Capacity [Ah]
2.25
Gravimetric energy density [Wh/kg]
149
Gravimetric power density [W/kg]
100
Max continuous discharge [A]
1.5
Volume [cm³]
22.4
Mass [g]
55
Positive electrode (cathode)
Negative electrode (anode)
Value
Applications & Use‑Cases
The Panasonic UR18650AAN is well suited to the following applications due to its cylindrical 18650 form factor and high energy density 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.
Energy Storage: Requires stable cycle life across deep discharge profiles, reliable calendar life under float conditions, and consistent capacity retention over extended deployment periods.
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 Panasonic UR18650AAN across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access Panasonic UR18650AAN constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not UR18650AAN data.)
Constant Current Temperature
Access Panasonic UR18650AAN thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not UR18650AAN data.)
Pulse Power Behaviour
Access Panasonic UR18650AAN pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not UR18650AAN data.)
Dynamic Profile Response
Access Panasonic UR18650AAN 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 UR18650AAN 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 Panasonic UR18650AAN with similar Cylindrical 18650 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Panasonic
Panasonic Energy is a Japanese manufacturer and one of the largest producers of cylindrical lithium-ion cells
Panasonic Energy is part of the Panasonic group, headquartered in Osaka, Japan, and is one of the world's largest manufacturers of cylindrical lithium-ion cells. Its NCR and UR series 18650 cells set long-standing benchmarks for energy density and reliability in laptops, power tools and electric bicycles, and its 2170 cells supply automotive customers from plants in Japan, Nevada and Kansas. The company favours high-nickel NCA cathodes and has pursued steady capacity gains within the established cylindrical formats rather than changes of architecture. Its catalogue runs from small 14500 and 18500 cells through 18650, 20700 and 21700. Panasonic's cells are among the most widely characterised in the industry.
Frequently Asked Questions
What is the capacity and voltage of the Panasonic UR18650AAN?
The Panasonic UR18650AAN has a nominal capacity of 2.25 Ah and a nominal voltage of 3.65 V, providing 8.21 Wh of energy per cell.
What is the maximum continuous discharge capability of the Panasonic UR18650AAN?
The Panasonic UR18650AAN supports continuous discharge rates up to 1.5 A, delivering a power density of 100 W/kg.
How much does the Panasonic UR18650AAN weigh and what is its volume?
The cell has a mass of 55 g and a volume of 22.4 cm³.
In which industries is the Panasonic UR18650AAN commonly used?
The Panasonic UR18650AAN is used across aviation, e-mobility and energy storage, applications that demand high energy density and consistent performance over extended cycles.
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.
