Pouch High-Power Cell
Amprius SA23
Pouch cell delivering 23 Ah capacity with 313 Wh/kg energy density and 69.0 A maximum discharge rate.
Overview
The Amprius SA23 is a lithium-ion pouch cell designed for applications that demand reliable performance and consistent capacity delivery. Released in 2023 and with the manufacturer based in the United States, this pouch cell delivers 23 Ah capacity and 80.5 Wh of energy at a nominal voltage of 3.5 V, with a maximum continuous discharge capability of 69 A, making it well suited to high-power systems requiring sustained current delivery. Its silicon-additive graphite anode contributes to a gravimetric energy density of 313 Wh/kg, above the median for pouch cells in the Voltt library.
Key Features
High discharge rate: 69.0 A continuous (3.0 C)
Charging rate: 1.0 C charging rate
Energy density: 313 Wh/kg
Power density: 940 W/kg
Applications: drones, aviation, e-mobility
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Amprius
Model
SA23
Type
Li-ion
Form factor
Pouch
Country of origin
United States
Release year
2023
Nominal voltage
3.5
Energy capacity [Wh]
80.5
Capacity [Ah]
23
Gravimetric energy density [Wh/kg]
313
Gravimetric power density [W/kg]
940
Max continuous discharge [A]
69
Volume [cm³]
117.12
Mass [g]
257
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Graphite/Si additive
Value
Applications & Use‑Cases
The Amprius SA23 is well suited to the following applications due to its pouch form factor and high power performance.
Drones: Demands high gravimetric power density for thrust and payload capacity, rapid current response for flight control, and stable voltage delivery across dynamic flight profiles.
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.
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 Amprius SA23 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
The Amprius SA23 constant-current plots reveal voltage behaviour under steady loads, ideal for analysing efficiency.
Constant Current Temperature
The Amprius SA23 constant-current plots reveal temperature behaviour under steady loads, ideal for analysing thermal response.
Pulse Power Behaviour
The Amprius SA23 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 Amprius SA23 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 Amprius SA23 with similar Pouch cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Amprius
Amprius Technologies is an American silicon anode battery manufacturer
Amprius Technologies is pioneering next-generation lithium-ion batteries using proprietary silicon nanowire anode technology. Their advanced cells achieve industry-leading gravimetric energy densities, enabling extended range for electric vehicles and aerospace applications. Amprius batteries deliver up to 500 Wh/kg at the cell level, significantly outperforming conventional graphite-based cells. Based in Fremont, California, Amprius serves demanding markets including aviation, defense, and premium EVs where weight savings translate directly to performance gains. Their silicon anode platform represents a breakthrough in battery energy density, addressing critical range anxiety challenges while maintaining safety and cycle life standards required for commercial deployment.
Frequently Asked Questions
What is the capacity and voltage of the Amprius SA23?
The Amprius SA23 has a nominal capacity of 23 Ah and a nominal voltage of 3.5 V, providing 80.5 Wh of energy per cell.
What is the maximum continuous discharge capability of the Amprius SA23?
The Amprius SA23 supports continuous discharge rates up to 69.0 A, delivering a power density of 940 W/kg.
How much does the Amprius SA23 weigh and what is its volume?
The cell has a mass of 257 g and a volume of 117.12 cm³.
In which industries is the Amprius SA23 commonly used?
The Amprius SA23 is used across aviation, motorsports, e-mobility, applications that demand high power delivery and reliable performance across demanding duty cycles.
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.
