Cylindrical 21700 High-Power Cell
Tenpower 40TG
Cylindrical 21700 cell delivering 4 Ah capacity with 215 Wh/kg energy density and 35 A maximum discharge rate.
Overview
The Tenpower 40TG is a high-power lithium-ion cylindrical 21700 cell designed for applications that demand reliable performance and consistent capacity delivery. Released in 2022 and with the manufacturer based in Malaysia, this cylindrical 21700 cell delivers 4 Ah capacity and 14.4 Wh of energy at a nominal voltage of 3.6 V, with a maximum continuous discharge capability of 35 A, making it well suited to high-power systems requiring sustained current delivery. Its silicon-additive graphite anode contributes to a gravimetric energy density of 215 Wh/kg, above the median for 21700 cells in the Voltt library.
Key Features
High discharge rate: 35 A continuous (8.8 C)
Charging rate: 2.0 C charging rate
Energy density: 215 Wh/kg
Power density: 1881 W/kg
Applications: aviation, motorsports, drones
Technical Specifications from the Manufacturer
Parameter
Manufacturer
Tenpower
Model
INR21700-40TG
Type
Li-ion
Form factor
Cylindrical 21700
Country of origin
Malaysia
Release year
2022
Nominal voltage
3.6
Energy capacity [Wh]
14.4
Capacity [Ah]
4
Gravimetric energy density [Wh/kg]
215
Gravimetric power density [W/kg]
1881
Max continuous discharge [A]
35
Volume [cm³]
25.05
Mass [g]
67
Positive electrode (cathode)
Ni-based
Negative electrode (anode)
Graphite/Si additive
Value
Applications & Use‑Cases
The Tenpower 40TG is well suited to the following applications due to its cylindrical 21700 form factor 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: Demands high gravimetric power density for thrust and payload capacity, rapid current response for flight control, and stable voltage delivery across dynamic flight profiles.
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 Tenpower 40TG across key indicators, including constant current behaviour, rate capability, temperature dependence, and available power under representative drive cycle conditions.
Constant Current Voltage
The Tenpower 40TG constant-current plots reveal voltage behaviour under steady loads, ideal for analysing efficiency.
Constant Current Temperature
The Tenpower 40TG constant-current plots reveal temperature behaviour under steady loads, ideal for analysing thermal response.
Pulse Power Behaviour
The Tenpower 40TG 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 40TG 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 Tenpower 40TG 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 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 40TG?
The Tenpower 40TG has a nominal capacity of 4 Ah and a nominal voltage of 3.6 V, providing 14.4 Wh of energy per cell.
What is the maximum continuous discharge capability of the Tenpower 40TG?
The Tenpower 40TG supports continuous discharge rates up to 35 A, delivering a power density of 1881 W/kg.
How much does the Tenpower 40TG weigh and what is its volume?
The cell has a mass of 67 g and a volume of 25.05 cm³.
In which industries is the Tenpower 40TG commonly used?
The Tenpower 40TG is used across aviation, motorsports, drones, applications that demand very high power output and thermal management under extreme discharge.
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.
