UPS for Raspberry Pi Powered by 21700 Battery
Blog | Published by Alex on November 3, 2025
The Raspberry Pi can now be equipped with an innovative UPS (Uninterruptible power supply) expansion board, ensuring stable operation even during power outages. This UPS expansion board is designed to support a 4-cell 21700 battery holder, providing up to 10,000mAh of battery capacity (using 2 x
21700 batteries), making it capable of reliably powering Raspberry Pi even under the most demanding applications.
The UPS installed on the back of the Raspberry Pi
What is Raspberry Pi?
Raspberry Pi is a small, affordable single-board computer developed by the Raspberry Pi Foundation. It is designed for education, programming, and DIY projects. Despite its compact size, it can run a full operating system, connect to monitors, keyboards, and peripherals, and support internet access. Raspberry Pi features GPIO pins for hardware control, making it ideal for electronics, robotics, and IoT applications. It is widely used in learning programming, building media centers, smart home projects, and industrial prototyping, offering a versatile, low-cost computing platform for both beginners and professionals.
Stable 5V Uninterruptible Power
Raspberry Pi receives stable 5.1V 6A (6000mA) backup power through a spring pin connector. Whether running resource-intensive programs or powering multiple peripherals, it ensures continuous and stable operation without interruption from power failures.
Intelligent Power Management
The UPS expansion board features an advanced power management system that monitors the Raspberry Pi’s power status in real time and automatically cuts off power when the device is shut down, entering an ultra-low-power standby mode. This optimizes battery life and ensures efficient operation.
Seamless Power Switching
In the event of AC power loss or adapter failure, Raspberry Pi can seamlessly switch to backup power, ensuring continuous operation and preventing unexpected data loss or system interruption.
Convenient Features
Raspberry Pi can automatically power on when electricity is restored, and also supports software-controlled safe shutdown, eliminating the need for manual intervention.
Fast Charging
The UPS expansion board supports up to 3A (3000mA) fast charging, allowing the backup power to recharge quickly and always be ready.
Multi-functional and Compatible Design
With a bottom-mount design that does not occupy the 40-pin GPIO interface, it is easy to stack with other expansion boards, enabling more Raspberry Pi functionality and meeting diverse application needs.
Safe Data Backup
Raspberry Pi can integrate seamlessly with a full range of storage devices, ensuring data protection even during power outages so that important information is never lost.
Enhanced Application Scenarios
This UPS solution not only benefits home users and hobbyists but also makes Raspberry Pi suitable for critical industrial applications, IoT projects, remote monitoring systems, and educational labs. Its high-capacity battery, intelligent power management, and rapid charging ensure that even long-term or unattended deployments remain reliable. The spring pin connection guarantees stable and secure electrical contact, minimizing the risk of disconnection during movement or vibration.
With the support of this UPS expansion board and stable 5V uninterruptible power via the spring pin connector, Raspberry Pi’s reliability and performance are significantly enhanced. Whether for learning, development, or industrial applications, it ensures uninterrupted operation and safeguards your valuable data, making it a truly robust solution for both personal and professional projects.
