Cylindrical 40135 Cell
Tenpower 20A
Cylindrical 40135 cell delivering 20 Ah capacity with 183 Wh/kg energy density and 20 A maximum discharge rate.
Overview
The Tenpower 20A is a high-power lithium-ion cylindrical 40135 cell designed for applications that demand both sustained high current and high energy density. Released in 2022 and with the manufacturer based in China, this cylindrical 40135 cell delivers 20 Ah capacity and 64.0 Wh of energy at a nominal voltage of 3.2 V, with a maximum continuous discharge capability of 20 A, making it well suited to high-power systems operating under aggressive discharge profiles. The 20A stands out within the 20 Ah class by pairing a competitive energy density of 183 Wh/kg with the 1.0 C discharge rate more commonly associated with lower-capacity power cells in the Voltt library.
Key Features
Discharge rate: 20 A continuous (1.0 C)
Charging rate: 1.0 C charging rate
Energy density: 183 Wh/kg
Power density: 183 W/kg
Applications: aviation, e-mobility, energy storage
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Tenpower
Model
IFR40135-20A
Type
Li-ion
Form factor
Cylindrical 40135
Country of origin
China
Release year
2022
Nominal voltage
3.2
Energy capacity [Wh]
64
Capacity [Ah]
20
Gravimetric energy density [Wh/kg]
183
Gravimetric power density [W/kg]
183
Max continuous discharge [A]
20
Volume [cm³]
Mass [g]
350
Positive electrode (cathode)
LFP
Negative electrode (anode)
Graphite
Value
Applications & Use‑Cases
The Tenpower 20A is well suited to the following applications due to its cylindrical 40135 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 Tenpower 20A across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
The Tenpower 20A constant-current plots reveal voltage behaviour under steady loads, ideal for analysing efficiency.
Constant Current Temperature
The Tenpower 20A constant-current plots reveal temperature behaviour under steady loads, ideal for analysing thermal response.
Pulse Power Behaviour
The Tenpower 20A 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 Tenpower 20A mission-profile plots simulate real-world duty cycles, showing how the cell manages dynamic power demands and temperature changes.
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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 20A with similar Cylindrical 40135 cells offering comparable capacity and performance characteristics.
Model
Capacity
Max Discharge
Typical Use
Access Cell Data
Manufacturer Background
Tenpower
Tenpower is a Chinese lithium-ion battery manufacturer
Tenpower is an emerging Chinese battery manufacturer specializing in high-performance lithium-ion cylindrical cells for electric vehicles and energy storage applications. Their 21700 format cells emphasize cost-effective energy density and reliable cycle life for mass-market EV adoption. Tenpower's manufacturing approach focuses on process optimization and quality control to deliver competitive battery solutions for China's rapidly expanding electric vehicle market. With investments in automated production lines and material science research, Tenpower aims to capture growing demand from domestic automotive manufacturers and international battery pack integrators. Their cylindrical cell technology balances performance characteristics with manufacturing scalability, positioning them as a value-oriented supplier in the global battery supply chain.
Frequently Asked Questions
What is the capacity and voltage of the Tenpower 20A?
The Tenpower 20A has a nominal capacity of 20 Ah and a nominal voltage of 3.2 V, providing 64.0 Wh of energy per cell.
What is the maximum continuous discharge capability of the Tenpower 20A?
The Tenpower 20A supports continuous discharge rates up to 20 A, delivering a power density of 183 W/kg.
How much does the Tenpower 20A weigh and what is its volume?
The cell has a mass of 350 g.
In which industries is the Tenpower 20A commonly used?
The Tenpower 20A is used across aviation, e-mobility, energy storage, applications that demand high energy density and consistent performance over extended cycles.
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.
