Cylindrical 21700 High-Power Cell
Tenpower 50XG
High-power cylindrical 21700 cell delivering 5 Ah capacity with 257 Wh/kg energy density and 90 A maximum discharge rate.
Overview
The Tenpower INR21700-50XG is a high-power Li-ion cylindrical 21700 cell designed for applications that demand sustained high current and high energy density. Manufactured in Malaysia, this cylindrical 21700 cell delivers 5 Ah capacity and 18 Wh of energy at a nominal voltage of 3.6 V, with a maximum continuous discharge capability of 90 A, making it well suited to high-power systems such as aviation, motorsports, and drones. The 50XG stands out within the 5 Ah class by pairing the energy capacity of a standard 5 Ah cell with the 18C discharge rate more commonly found in sub-4 Ah power cells, and its silicon-additive graphite anode contributes to the cell's elevated gravimetric energy density relative to peers at this discharge level.
Key Features
Extremely high discharge rate: 90 A continuous (18.0 C)
Charging rate: 2.0 C charging rate
Energy density: 257 Wh/kg
Power density: 4,629 W/kg
Applications: Aviation, motorsports, drones
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Tenpower
Model
INR21700-50XG
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
Malaysia
Release year
2025
Nominal voltage
3.6
Energy capacity [Wh]
18
Capacity [Ah]
5
Gravimetric energy density [Wh/kg]
257
Gravimetric power density [W/kg]
4629
Max continuous discharge [A]
90
Volume [cm³]
25.36
Mass [g]
70
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Graphite/Si additive
Value
Applications & Use‑Cases
The Tenpower 50XG is well suited to the following applications due to its cylindrical 21700 format and high power 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.
Motorsports: Demands sustained high discharge under competitive load profiles, rapid transient response for acceleration, and thermal stability to maintain performance during race conditions.
Drones: Requires high power-to-weight ratio for lift and manoeuvrability, stable discharge under variable loads, and compact cylindrical packaging for efficient pack integration.
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 Tenpower 50XG across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
Access Tenpower 50XG constant-current discharge curves in Voltt to size your pack against the voltage window your system actually needs. (Chart shown is illustrative, not 50XG data.)
Constant Current Temperature
Access Tenpower 50XG thermal discharge data in Voltt to specify cooling and cell spacing before you commit to a pack layout. (Chart shown is illustrative, not 50XG data.)
Pulse Power Behaviour
Access Tenpower 50XG pulse power maps in Voltt to set peak current limits and parallel count for your worst-case load. (Chart shown is illustrative, not 50XG data.)
Dynamic Profile Response
Access Tenpower 50XG 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 50XG 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 Tenpower 50XG with similar Cylindrical 21700 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Tenpower
Tenpower is a Chinese cylindrical lithium-ion cell manufacturer
Jiangsu Tenpower Lithium was founded in 2006 and is based in Zhangjiagang, China, where it develops and manufactures cylindrical lithium-ion cells in the 18650 and 21700 formats. Its catalogue covers both lithium iron phosphate and nickel-based chemistries, tuned for high power delivery, thermal stability and fast charging. The company supplies power tools, electric two-wheelers and light mobility, vacuum cleaners and energy storage customers across more than forty countries, having shipped cells in the billions since founding. It is a subsidiary of a listed Chinese industrial group, which underwrites its manufacturing capacity. Tenpower is an established high-volume supplier in the cylindrical power-cell segment rather than a recent entrant.
Frequently Asked Questions
What is the capacity and voltage of the Tenpower 50XG?
The Tenpower 50XG has a nominal capacity of 5.0 Ah and a nominal voltage of 3.6 V, providing 18.0 Wh of energy per cell.
What is the maximum continuous discharge capability of the Tenpower 50XG?
The Tenpower 50XG supports continuous discharge rates up to 90 A, delivering exceptional power density of 4,629 W/kg.
How much does the Tenpower 50XG weigh and what is its volume?
The cell has a mass of 70 g and a volume of 25.36 cm³.
In which industries is the Tenpower 50XG commonly used?
The Tenpower 50XG is used across aviation, motorsports, and drones, applications that demand both high energy density and extreme discharge capability at the 5 Ah capacity level.
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.
