Cylindrical 21700 High-Power Cell
Ampace JP50
Cylindrical 21700 cell delivering 5 Ah capacity, 249 Wh/kg energy density and 60 A maximum discharge rate.
Overview
The Ampace JP50 is a high-power Li-ion cylindrical 21700 cell designed for applications that demand sustained high current. Released in 2025 and with the manufacturer based in China, this cylindrical 21700 cell delivers 5 Ah capacity and 17.9 Wh of energy at a nominal voltage of 3.58 V, with a maximum continuous discharge capability of 60 A, making it well suited to high-power systems. At 12.0 C its continuous discharge capability is high for a cell of this capacity class.
Key Features
Extremely high discharge rate: 60 A continuous (12.0 C)
Energy density: 249 Wh/kg
Power density: 2983 W/kg
Capacity: 5 Ah nominal capacity
Applications: drones, motorsports, aviation
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Ampace
Model
JP50
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
China
Release year
2025
Nominal voltage
3.58
Energy capacity [Wh]
17.9
Capacity [Ah]
5
Gravimetric energy density [Wh/kg]
249
Gravimetric power density [W/kg]
2983
Max continuous discharge [A]
60
Volume [cm³]
25.2
Mass [g]
72
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Value
Applications & Use‑Cases
The Ampace JP50 is well suited to the following applications due to its 21700 format 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.
Motorsports: Demands sustained high discharge under competitive load profiles, rapid transient response for acceleration, and thermal stability to maintain performance during race conditions.
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.
General Applications: Suitable for applications requiring reliable lithium-ion performance with proven cycle life, consistent capacity delivery, and operational safety across diverse use cases.
.jpg)
Performance & Model Data
Below are modelled performance metrics for the Ampace JP50 across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
The Ampace JP50 constant-current plots reveal voltage behaviour under steady loads, ideal for analysing efficiency.
Constant Current Temperature
The Ampace JP50 constant-current plots reveal temperature behaviour under steady loads, ideal for analysing thermal response.
Pulse Power Behaviour
The Ampace JP50 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 Ampace JP50 mission-profile plots simulate real-world duty cycles, showing how the cell manages dynamic power demands and temperature changes.
.png)
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 Ampace JP50 with similar Cylindrical 21700 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Ampace
Ampace is a Chinese high-power battery manufacturer
Ampace Technology Limited is a Chinese battery manufacturer producing lithium-ion cylindrical cells for electric vehicles, consumer electronics, and industrial applications. Their 21700 cells combine modern cell chemistry with competitive manufacturing capabilities to serve Asia-Pacific markets. Ampace focuses on delivering reliable battery performance at accessible price points for mass-market electric vehicle adoption. The company's manufacturing facilities employ automated production equipment to ensure consistent quality control and scalability. Ampace's product development targets mainstream EV specifications, balancing energy density, power capability, and cycle life requirements. As a newer entrant in the competitive battery manufacturing landscape, Ampace leverages China's battery supply chain advantages to offer cost-effective solutions for growing electrification demands.
Frequently Asked Questions
What is the capacity and voltage of the Ampace JP50?
The Ampace JP50 has a nominal capacity of 5 Ah and a nominal voltage of 3.58 V, providing 17.9 Wh of energy per cell.
What is the maximum continuous discharge capability of the Ampace JP50?
The Ampace JP50 supports continuous discharge rates up to 60 A, delivering a power density of 2983 W/kg.
How much does the Ampace JP50 weigh and what is its volume?
The cell has a mass of 72 g and a volume of 25.2 cm³.
In which industries is the Ampace JP50 commonly used?
The Ampace JP50 is used across drones, motorsports, aviation, applications that demand sustained high current.
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.
