INR21700-40P

INR21700-40PHigh-Rate Lithium-Ion Battery Features:

Ultra-High Discharge Capacity

Instant High Current Output

Low Internal Resistance

High Power Performance

Strong Durability

INR21700-40PHigh-Rate Lithium-Ion Battery Application Areas:

Garden Tools
Power Tools
Hair Clippers

INR21700-40PHigh-Rate Lithium-Ion Battery Parameter：

Cell's Materials	Pure Ternary 811
Dimension	Height: 70.8±0.2mm
Dimension	Diameter: 21.7±0.15mm
Nominal Voltage	3.6V
Nominal Capacity (0.2c)	4000mAh
Internal Resistance	≤22mΩ
Weight	66.5±1g
Max Discharge Rate	8C
Max Charge Rate	1C
Cycle life (DOD 80% 25℃)	Charge:0.5C, Discharge:5C≥500 cycles, Charge:0.5C, Discharge:3C≥1500 cycles
Operating Temperature (Cell Surface)	Charge: 0~45℃ Discharge: -10~60℃

Next Product Inquire Now

The INR21700-40P High-Rate Lithium-Ion Battery is a premium-grade cylindrical cell designed for power-hungry applications such as electric mobility, cordless tools, energy storage systems, and industrial equipment. With a nominal capacity of 4000mAh and continuous discharge rate of up to 10C, this battery delivers stable power output, exceptional thermal control, and long cycle life.

Manufactured by Zigong JOINSUN Technology Co., Ltd., the INR21700-40P is engineered using high-quality raw materials and advanced lithium-ion chemistry, ensuring excellent safety, low self-discharge, and superior current performance.

Application of INR21700-40P High-Rate Lithium-Ion Battery

The INR21700-40P lithium-ion cell is specifically engineered for high-discharge applications, offering consistent performance under heavy loads. With its 4000mAh capacity and up to 40A continuous discharge capability, it meets the demanding power needs of modern electric systems. Below are the key industries and applications where this high-rate battery excels.

1. Electric Mobility (E-Mobility)

The 40P cell is widely used in:

Electric bicycles and scooters
Electric motorcycles
Low-speed electric vehicles (LSEVs), such as delivery carts and warehouse AGVs

Benefit: Higher energy density means fewer cells per pack, reducing weight and improving efficiency.

2. Cordless Power Tools

Drills, impact drivers, saws, grinders
Industrial handheld devices
Battery-powered construction equipment

Why it's ideal: High discharge rate (up to 40A) ensures instant power burst and sustained runtime.

3. Energy Storage Systems (ESS)

Residential solar battery backup
Portable power stations
Modular battery banks for smart homes

With long cycle life (≥1000 cycles), the 40P cell is well-suited for deep-cycle ESS usage.

4. Smart Agriculture and Electric Farming Tools

Battery-powered sprayers and tractors
Irrigation controllers
Field monitoring devices

Rural and remote areas benefit from its reliability and low maintenance needs.

5. Outdoor and Off-Grid Power Solutions

Camping power banks
Emergency backup batteries
Portable solar generators

Lightweight and compact design makes it ideal for mobile applications with demanding power needs.

6. Military and Tactical Equipment

Military radios
Unmanned ground vehicles (UGVs)
Night vision and surveillance gear

Military-grade applications require high reliability, extreme temperature resistance, and fast discharge – all supported by the INR21700-40P.

7. Aerospace and Low-Altitude Economy

Drones and UAVs
Electric aviation prototypes
Aeronautical instrumentation

Lightweight yet powerful, the 40P cell helps reduce payload stress while maximizing battery life.

Summary of Application Benefits

Electric Mobility	High energy density, compact form factor
Power Tools	Instant torque, high amp discharge
Energy Storage	Long cycle life, safe chemistry
Agriculture	Low maintenance, robust output
Military Devices	Rugged design, thermal stability
Off-Grid Power	Portability, extended runtime

Frequently Asked Questions (FAQ)

Q1: What does “40P” stand for in INR21700-40P?

A: It indicates the model supports 4000mAh capacity and “P” refers to its high-power output profile.

Q2: Can this battery be used in high-drain tools like angle grinders?

A: Yes, with a 10C discharge rate, it is ideal for high-load cordless power tools.

Q3: Is the INR21700-40P rechargeable?

A: Yes, it’s a rechargeable lithium-ion battery with more than 1000 charge cycles.

Q4: What charger should I use with this battery?

A: Use a lithium-ion charger that supports 4.2V cutoff and current within manufacturer specs.

Q5: Can Joinsun customize this battery into packs for B2B applications?

A: Absolutely. We offer customized solutions for mobility, industry, storage, and defense applications. Joinsun provides full OEM/ODM customization services, including:

Series and parallel pack assembly
BMS (Battery Management System) integration
Custom voltage/capacity output
Casing, wiring, and connector options

Q6: Contact Us for Custom Battery Solutions

Whether you're building a new energy storage system, electric vehicle, or smart device, Joinsun’s INR21700-40P is the right choice for high-drain, mission-critical applications. Contact us now to discuss OEM/ODM battery solutions tailored to your industry.

Product Differentiation/Why Choose Joinsun:

01

Source Factory

With comprehensive services and quality assurance, employing cutting-edge technology and high-end materials to provide a longer average lifespan.
02

Professional Team and Advanced Production Equipment

A research and development team of over 30 people with 24 related patents. The company covers an area of 100 acres, equipped with 8 advanced coating production lines, 3 fully automated injection lines, 10 sets of fully automatic sheet winding machines, 6 fully automatic integrated welding production lines, etc., meeting the production capacity demand of 20GWh per day, ensuring product efficiency and quality.
03

Sales Network and Services

Jixin Technology has established offices in East China, South China, and an overseas affairs department, with sales networks gradually expanding to cover the Middle East and Southeast Asia regions. Striving to become a leading supplier in the power battery and energy storage lithium battery markets, providing comprehensive service and support.
04

High Cost-Effectiveness

Joinsun products provide high value for their cost.

Industrial Packaging That Can Be Customized According to Requirements.

* Warranty Policy: Provide warranty and replacement service within a certain period of time to ensure the interests of customers.

* Important Notes: Please strictly follow the instructions provided in the product manual.

Customer Feedbacks

JOINSUN battery packs a powerful punch. lt has never failed to provide enough energy to keep our devices running smoothly. From our smartphone to my portable speakers, this battery has got it covered.

Jacob

JOINSUN has provided us with customized lithium battery solutions for our energy storage systems. Their batteries are UL and CE certified, ensuring safety and reliability. Fast shipping and great customer support!

John

We needed custom lithium battery packs for our electric bikes, and JOINSUN delivered exactly what we wanted. Their R&D team helped optimize the design, and the production was quick. Definitely our go-to supplier for long-term cooperation!

Sarah

We've been sourcing 18650 and 21700 battery packs from JOINSUN for over a year. The battery quality is excellent, with stable performance, high capacity, and long cycle life. Their team is very professional and responsive. Highly recommended!