Pouch High-Energy Cell
Amprius SA109
High-energy pouch cell delivering 11 Ah capacity with 425 Wh/kg energy density and 11.5 A maximum discharge rate.
Overview
The Amprius SA109 is a lithium-ion pouch cell designed for applications that demand high energy density and consistent capacity delivery. Released in 2025 and with the manufacturer based in the United States, this pouch cell delivers 11 Ah capacity and 37.4 Wh of energy at a nominal voltage of 3.4 V, with a maximum continuous discharge capability of 11.5 A, making it well suited to energy-focused applications requiring extended runtime. Among the pouch cells in the About:Energy battery library, the Amprius SA109 ranks 15th of 104 for gravimetric energy density. Its 425 Wh/kg compares with a pouch median of 341 Wh/kg.
Key Features
Discharge rate: 11.5 A continuous (1.0 C)
Energy density: 425 Wh/kg
Power density: 444 W/kg
Cathode: Ni-based
Applications: aviation, e-mobility, energy storage
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Amprius
Model
SA109
Type
Li-ion
Form factor
Pouch
Country of origin
United States
Release year
2025
Nominal voltage
3.41
Energy capacity [Wh]
39.2
Capacity [Ah]
11.5
Gravimetric energy density [Wh/kg]
445
Gravimetric power density [W/kg]
446
Max continuous discharge [A]
11.5
Volume [cm³]
37.3698
Mass [g]
88
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Value
Applications & Use‑Cases
The Amprius SA109 is well suited to the following applications due to its pouch 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 Amprius SA109 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access Amprius SA109 constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not SA109 data.)
Constant Current Temperature
Access Amprius SA109 thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not SA109 data.)
Pulse Power Behaviour
Access Amprius SA109 pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not SA109 data.)
Dynamic Profile Response
Access Amprius SA109 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 SA109 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 SA109 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 SA109?
The Amprius SA109 has a nominal capacity of 11 Ah and a nominal voltage of 3.4 V, providing 37.4 Wh of energy per cell.
What is the maximum continuous discharge capability of the Amprius SA109?
The Amprius SA109 supports continuous discharge rates up to 11.5 A, delivering a power density of 444 W/kg.
How much does the Amprius SA109 weigh and what is its volume?
The cell has a mass of 88 g and a volume of 37.4 cm³.
In which industries is the Amprius SA109 commonly used?
The Amprius SA109 is used across aviation, e-mobility and energy storage, applications that demand high energy density and consistent performance over extended cycles.
How does the Amprius SA109 compare with the Enpower Greentech 0108J?
Comparing the Amprius SA109 with the Enpower Greentech 0108J: capacity 11 Ah against 10.8 Ah; maximum continuous discharge 11.5 A against 32.4 A; energy density 425 Wh/kg against 372 Wh/kg; mass 88 g against 102 g. Both datasheets can be compared side by side in The Voltt.
What chemistry and format is the Amprius SA109?
The Amprius SA109 is a pouch cell with a Ni-based cathode. It has a nominal voltage of 3.4 V and a volume of 37.4 cm³. Its full datasheet is free to view in The Voltt.
