Pouch High-Energy Cell
Amprius SA09
Pouch cell delivering 8 Ah capacity with 375 Wh/kg energy density and 8.0 A maximum discharge rate.
Overview
The Amprius SA09 is a lithium-ion pouch cell designed for applications that demand reliable performance and competitive energy storage. Released in 2024 and with the manufacturer based in the United States, this pouch cell delivers 8 Ah capacity and 27.2 Wh of energy at a nominal voltage of 3.4 V, with a maximum continuous discharge capability of 8 A, making it well suited to energy-focused applications requiring extended runtime. The SA09 prioritises energy storage over peak power, with discharge limited to 1.0 C and a gravimetric energy density of 375 Wh/kg above the median for its format class in the Voltt library, and its silicon-additive graphite anode contributes to the elevated gravimetric energy density relative to peers at this discharge level.
Key Features
Discharge rate: 8.0 A continuous (1.0 C)
Charging rate: 1.0 C charging rate
Energy density: 375 Wh/kg
Power density: 375 W/kg
Applications: drones, aviation, e-mobility
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Amprius
Model
SA09
Type
Li-ion
Form factor
Pouch
Country of origin
United States
Release year
2024
Nominal voltage
3.4
Energy capacity [Wh]
27.2
Capacity [Ah]
8
Gravimetric energy density [Wh/kg]
375
Gravimetric power density [W/kg]
375
Max continuous discharge [A]
8
Volume [cm³]
38.46
Mass [g]
72.5
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Graphite/Si additive
Value
Applications & Use‑Cases
The Amprius SA09 is well suited to the following applications due to its pouch form factor and high energy density 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 SA09 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access Amprius SA09 constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not SA09 data.)
Constant Current Temperature
Access Amprius SA09 thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not SA09 data.)
Pulse Power Behaviour
Access Amprius SA09 pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not SA09 data.)
Dynamic Profile Response
Access Amprius SA09 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 SA09 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 Amprius SA09 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 lithium-ion cell manufacturer
Amprius Technologies was founded in 2008 and is based in Fremont, California, where it develops and manufactures lithium-ion pouch cells built on silicon anodes rather than graphite. Its SiMaxx platform uses a silicon nanowire anode and sits at the high-energy end of the commercial market, while the SiCore platform is designed for production at larger volumes through manufacturing partners. The cells serve uncrewed aerial systems, electric aviation, defence and other weight-limited platforms where every gram of pack mass reduces endurance or payload. The company is scaling output at a large facility in Brighton, Colorado. Its position rests on bringing silicon-anode chemistry into qualified, shipping products.
Frequently Asked Questions
What is the capacity and voltage of the Amprius SA09?
The Amprius SA09 has a nominal capacity of 8 Ah and a nominal voltage of 3.4 V, providing 27.2 Wh of energy per cell.
What is the maximum continuous discharge capability of the Amprius SA09?
The Amprius SA09 supports continuous discharge rates up to 8.0 A, delivering a power density of 375 W/kg.
How much does the Amprius SA09 weigh and what is its volume?
The cell has a mass of 72.5 g and a volume of 38.46 cm³.
In which industries is the Amprius SA09 commonly used?
The Amprius SA09 is used across aviation, e-mobility, energy storage, applications that demand high energy density and extended runtime in weight-sensitive applications.
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.
