7.4V 2000mAh 18650 Lithium-Ion Rechargeable Battery Pack (2 Cell Series)

The 7.4V 2000mAh 18650 Lithium-Ion Rechargeable Battery Pack (2 Cell Series) is a compact, high-performance rechargeable power source designed to deliver stable and reliable power for a wide range of portable electronic devices, robotics projects, and battery-powered systems. Constructed using two premium-quality 18650 Lithium-Ion cells connected in series (2S configuration), this battery pack provides a nominal output voltage of 7.4V and a capacity of 2000mAh, making it ideal for applications requiring dependable and long-lasting portable energy.

Built with advanced Lithium-Ion (Li-Ion) technology, the battery pack offers high energy density, lightweight construction, low self-discharge, and excellent charge-discharge efficiency. Compared to traditional rechargeable batteries, Lithium-Ion batteries provide longer operating time, higher efficiency, and a longer service life while maintaining a compact size.

The 2-cell series configuration (2S) increases the output voltage to 7.4V nominal, while maintaining the battery capacity of 2000mAh. When fully charged, the battery pack reaches approximately 8.4V, providing sufficient power for devices designed to operate from a 7.4V DC supply.

Manufactured using high-quality lithium-ion cells, the battery pack delivers stable voltage output, low internal resistance, and consistent performance throughout its discharge cycle. It is designed for repeated charging and discharging using a compatible 2S (7.4V) Lithium-Ion battery charger, helping reduce long-term operating costs and environmental impact.

Its compact and lightweight design allows easy integration into portable equipment, embedded systems, robotics, and custom battery-powered products. The durable construction ensures reliable operation under normal working conditions and makes it suitable for both hobby and professional applications.

The 7.4V 2000mAh 18650 Lithium-Ion Rechargeable Battery Pack is widely used in Arduino projects, ESP32 systems, Raspberry Pi projects, robotics, RC vehicles, drones, IoT devices, portable instruments, LED lighting systems, CCTV backup systems, wireless communication equipment, medical devices, security systems, GPS trackers, automation equipment, educational electronics, embedded systems, and DIY electronics projects.

Whether you are building a mobile robot, powering a portable electronic device, developing an embedded system, or replacing an existing rechargeable battery pack, this battery provides a dependable, efficient, and long-lasting power solution.

Working Principle

The battery pack consists of two 18650 Lithium-Ion cells connected in series (2S configuration).

During charging, lithium ions move from the positive electrode to the negative electrode inside each cell, storing electrical energy. During discharge, the ions move back to the positive electrode, generating electrical current that powers the connected device.

The series connection increases the output voltage to 7.4V nominal while maintaining the battery capacity at 2000mAh. The battery should always be charged using a compatible 2S Lithium-Ion battery charger to ensure safe operation and maximize battery lifespan.

Key Features

• Nominal voltage: 7.4V

• Capacity: 2000mAh

• Two-cell series (2S) configuration

• High-quality 18650 Lithium-Ion cells

• Rechargeable and reusable

• High energy density

• Stable voltage output

• Lightweight and compact design

• Low self-discharge rate

• Long charge-discharge cycle life

• Low internal resistance

• Reliable power delivery

• Durable construction

• Suitable for portable electronic devices

• Easy integration into battery-powered systems

Applications

The 7.4V 2000mAh 18650 Lithium-Ion Rechargeable Battery Pack is widely used in:

• Arduino projects

• ESP32 development

• ESP8266 projects

• Raspberry Pi systems

• Robotics

• RC vehicles

• Drones

• IoT devices

• Embedded systems

• Portable electronic devices

• LED lighting systems

• CCTV backup systems

• GPS trackers

• Wireless communication equipment

• Security systems

• Medical devices

• Automation equipment

• Educational electronics

• Electronic prototyping

• DIY electronics projects

Specifications

• Product Type: Rechargeable Lithium-Ion Battery Pack

• Battery Chemistry: Lithium-Ion (Li-Ion)

• Cell Type: 18650

• Configuration: 2S (2 Cells in Series)

• Nominal Voltage: 7.4V

• Fully Charged Voltage: 8.4V

• Capacity: 2000mAh

• Rechargeable: Yes

• Charging Method: Compatible 2S Lithium-Ion Battery Charger

• Application: Portable electronic devices and battery-powered systems

Package Includes

• 1 × 7.4V 2000mAh 18650 Lithium-Ion Rechargeable Battery Pack

Safety Precautions

• Charge only with a compatible 2S (7.4V) Lithium-Ion battery charger.

• Do not overcharge or over-discharge the battery pack.

• Avoid short-circuiting the battery terminals.

• Do not puncture, crush, or expose the battery pack to fire or excessive heat.

• Store in a cool, dry location away from direct sunlight.

• Do not use the battery pack if it becomes swollen, damaged, or overheated.

• Observe correct polarity when connecting to electronic devices.

• Keep away from water and conductive materials.