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. Among the 21700 cylindrical cells in the About:Energy battery library, the Ampace JP50 ranks 19th of 108 for maximum continuous discharge. Its 60 A compares with a 21700 cylindrical median of 35 A.
Key Features
Extremely high discharge rate: 60 A continuous (12.0 C)
Energy density: 249 Wh/kg
Power density: 2,983 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.
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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
Access Ampace JP50 constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not JP50 data.)
Constant Current Temperature
Access Ampace JP50 thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not JP50 data.)
Pulse Power Behaviour
Access Ampace JP50 pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not JP50 data.)
Dynamic Profile Response
Access Ampace JP50 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 JP50 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 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 lithium-ion cell manufacturer
Ampace was established in 2021 in Xiamen as a joint venture between CATL and Amperex Technology Limited, combining automotive-scale manufacturing with consumer cell engineering. The company produces high-power cylindrical cells in the 18650 and 21700 formats, sold under its Jumbo Power series, alongside prismatic cells for residential and commercial energy storage. Its cells are used in electric two-wheelers and light electric vehicles, power tools, robotics, drones and home storage systems, where sustained discharge and fast charge acceptance set the design limit. Manufacturing is concentrated at a large purpose-built site in Xiamen. Ampace is one of the faster-growing suppliers of high-rate cylindrical cells outside the established power-cell manufacturers.
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 2,983 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.
How does the Ampace JP50 compare with the Lishen 2170LE?
Comparing the Ampace JP50 with the Lishen 2170LE: capacity 5 Ah against 5 Ah; energy density 249 Wh/kg against 257 Wh/kg; mass 72 g against 70 g. Both datasheets can be compared side by side in The Voltt.
What chemistry and format is the Ampace JP50?
The Ampace JP50 is a cylindrical 21700 cell with a Ni-based cathode. It has a nominal voltage of 3.58 V and a volume of 25.2 cm³. Its full datasheet is free to view in The Voltt.
