Li-ion

High Drain 21700 40P 4AH Lithium ion Battery for Rdrones and UAVs, robotics systems, high-power flashlights

Parameter	Specification
Typical Capacity	4000mAh
Nominal Voltage	3.7V
Standard Charge Voltage	4.20V
Standard Charge Current	2A
Max. Charge Current	6A
Discharge Cut-off Voltage	2.50V
Max. Continuous Discharge Current	35A
Max. Pulse Discharge Current	80A (2s pulse)
Initial Impedance	≤15.0mΩ
Dimensions (Diameter x Height)	21.40 ± 0.10 mm × 70.25 ± 0.15 mm
Weight	68.0 ± 2.0g

CB, CE, UL, UN38.3, MSDS, IEC61000, IEC62133, EU2023/1542

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Product overview

VTCBATT: 21700 40P 4AH Lithium ion Battery Manufacture in China | Battery Manufacturers in China & Battery Supply Factory

VTCBATT is a professional 21700 40P 4Ah lithium-ion battery manufacturer in China, specializing in high-rate battery solutions for demanding applications. With advanced production lines, strict quality control, and extensive experience in lithium battery technology, VTCBATT delivers reliable performance, high discharge capability, and long cycle life. We offer flexible OEM/ODM services, including customized battery packs, BMS integration, and tailored specifications to meet specific project requirements. Our batteries are widely used in power tools, electric vehicles, and industrial equipment, providing efficient and stable power solutions for global customers.

01

High Capacity of 4000mAh

Experience extended runtimes. The generous 4000mAh capacity ensures prolonged battery life, reducing the frequency of recharges and keeping your devices ready when you need them.

02

10A Moderate Discharge Rate

Perfectly balanced power delivery. With a stable 10A continuous discharge rate, this battery is the ideal choice for powering low-to-moderate drain applications safely and efficiently.

03

Advanced Lithium-Ion Chemistry

Built with premium cell technology. Our lithium-ion chemistry offers high energy efficiency, excellent stability, and minimal power loss, ensuring a consistent power output.

04

Eco-Friendly, Rechargeable & Durable

Designed for the long haul. This highly durable cell supports multiple charge and discharge cycles without compromising performance, saving you money on replacements.

05

Upgraded 21700 Form Factor

Bigger size, better performance. The larger 21700 physical footprint naturally provides higher energy storage capacity and superior endurance than traditional 18650 standard batteries.

Technical insight

Product and application details

electric scooters

Its 35A continuous discharge supports the high torque demands of electric scooter motors during rapid acceleration.

high-power flashlights

The 80A pulse capability delivers intense bursts of light required for tactical high-power flashlight operation.

robotics systems

Low internal impedance of 15mΩ ensures stable voltage delivery for sensitive robotics system control circuits.

drones and UAVs

The compact 21.4mm diameter allows efficient integration into tight drone frames without compromising aerodynamic balance.

electric motorcycles

High capacity of 4Ah extends range while handling the sustained current loads of electric motorcycle drives.

portable power equipment

Lightweight design at 68g makes it ideal for portable power equipment where carrying weight is critical.

Power tools

Fast charging at 6A reduces downtime, keeping professional power tools ready for continuous job site use.

Phone Charger Bank

Standard 3.7V nominal voltage aligns perfectly with USB power bank circuitry for efficient device charging.

VTCBATT is a professional 21700 40P 4Ah lithium-ion battery manufacturer in China, specializing in high-rate battery solutions for demanding applications. With advanced production lines, strict quality control, and extensive experience in lithium battery technology, VTCBATT delivers reliable performance, high discharge capability, and long cycle life. We offer flexible OEM/ODM services, including customized battery packs, BMS integration, and tailored specifications to meet specific project requirements. Our batteries are widely used in power tools, electric vehicles, and industrial equipment, providing efficient and stable power solutions for global customers.

Factory capability

VTCBATT Production and Service

VTCBATT not only focuses on customized design and excellent service to meet the diverse demands of different customers, but also devotes itself to precise and standardized manufacturing in every process to ensure the highest-quality batteries. Meanwhile, VTCBATT provides comprehensive support from pre-sales to after-sales, focusing on customer feedback to establish long-term and win-win cooperation. VTCBATT professional sales and technical engineer teams will be your custom battery experts for reliable and responsive project support.

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Modern Manufacturing

From raw materials mixing to cell testing, VTCBATT adopts automated manufacturing processes to improve production efficiency and battery quality, safety, and reliability. The manufacturing process is monitored and tested before material moves to the next procedure.

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Trusted by Global Customers

Over the past 20 years, VTCBATT has built partnerships with customers in more than 50 countries. Reliable quality, responsive service, and tailored battery solutions support long-term cooperation with equipment manufacturers, distributors, and brands.

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