Uninterruptible power supply (UPS) expansion board for Raspberry Pi, providing continuous power during outages. Utilizes MAX17043 microcontroller for accurate power detection and onboard MCU for data processing. Basic I²C communication allows direct access to power level and battery voltage information. Compatible with 3.7V lithium-ion batteries, ensuring reliable performance. Maximum output current of 2A and operating temperature range of -40℃ to 85℃, suitable for various environments. The DFRobot Raspberry Pi UPS HAT is an uninterruptible power supply (UPS) expansion board for the Raspberry Pi. The UPS HAT can continuously power the Raspberry Pi for a period of time during system outages, preventing system damage caused by sudden power failures, which is often necessary in projects such as routing. The Raspberry Pi motherboard only needs basic I²C communication to directly obtain information such as power level and battery voltage. Note: This product is not compatible with Raspberry Pi 5. Technical Specifications: Power Supply Voltage: 4.5~5.5V Power Supply Current: (Recommended power adapter: 2A or higher) Power Interface: Micro-USB Maximum Charging Current: 1.6A Battery Interface: PH2.0-2P or solderable contacts Compatible Battery: 3.7V lithium-ion battery Output Voltage: 5V Maximum Output Current: 2A Compatible Motherboard: Raspberry Pi Raspberry Pi 3B+/2B/3B and possible subsequent versions (not applicable to Raspberry Pi 3B+, 5) Communication Interface: I²C Dimensions: 65mm x 56mm Mounting Hole Dimensions: 58mm x 49mm Operating Temperature: -40℃ to 85℃. Color: Black Material: ABS Package Contents: 1*UPS Power Expansion Board 1*Screws Set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.