The 18650 Dual Battery Holder with Cover and On/Off Switch is a durable and practical battery enclosure designed to securely hold two standard 18650 lithium-ion rechargeable batteries while providing a reliable and portable power source for electronic projects. Featuring a protective cover and an integrated ON/OFF slide switch, this battery holder offers safe battery storage, convenient power control, and easy battery replacement. It is widely used in robotics, Arduino projects, ESP32 development, IoT devices, LED lighting, portable instruments, DIY electronics, battery-powered prototypes, and embedded systems.

Constructed from high-quality ABS plastic, the holder incorporates nickel-plated steel spring contacts and flat terminals to ensure excellent electrical conductivity and secure battery retention. The spring-loaded contacts allow batteries to be installed and removed without soldering directly to the cells, helping prevent heat damage while simplifying maintenance. The protective cover keeps the batteries firmly in place and protects them from dust, accidental contact, and mechanical movement during operation.

The holder is commonly available in a 2-cell series (2S) configuration, providing a nominal output voltage of approximately 7.4V when powered by two 3.7V lithium-ion batteries and up to 8.4V when the batteries are fully charged. The integrated ON/OFF slide switch enables users to conveniently disconnect power without removing the batteries, helping conserve battery life during storage and improving overall safety. Its pre-attached wire leads allow for quick and easy integration into electronic circuits.

Designed for durability and long-term use, the battery holder supports both protected and most standard unprotected 18650 lithium-ion cells. Its lightweight construction, reusable design, and dependable performance make it an excellent choice for students, hobbyists, engineers, educators, and makers developing rechargeable battery-powered electronic projects.

Key Features

• Designed to hold two standard 18650 lithium-ion batteries
• Integrated ON/OFF slide switch
• Protective battery cover included
• Durable high-quality ABS plastic construction
• Nickel-plated steel spring contacts
• Secure battery retention
• Reliable electrical conductivity
• Easy battery installation and replacement
• No soldering required directly on batteries
• Pre-attached wire leads for quick circuit connection
• Commonly wired in a 2-cell series configuration
• Provides approximately 7.4V nominal output
• Compatible with protected and standard 18650 lithium-ion cells
• Lightweight and compact design
• Helps conserve battery life using integrated power switch
• Protects batteries from dust and accidental contact
• Suitable for Arduino, ESP32, Raspberry Pi, STM32, and other embedded platforms
• Ideal for robotics and automation projects
• Suitable for portable electronic devices
• Reusable and easy to maintain
• Long service life
• Perfect for DIY electronics and prototype development