Standard-size Raspberry Pi expansion interface cascading design, allowing for the cascading of other expansion boards. Supports 2A maximum current output, meeting more Raspberry Pi usage scenarios. Automatic charging/discharging path switching design to prevent power loss. More accurate 5-LED power indicator. Onboard Maxim patented algorithm fuel gauge IC, supports I²C communication for reading battery information, lithium battery charge/discharge protection, overheat protection, and mainboard power supply anti-reverse current protection. The DFRobot UPS HAT for Raspberry Pi Zero is an uninterruptible power supply (UPS) expansion board for the Raspberry Pi ZERO series, compatible with Pi 2/3/A+, etc. The UPS HAT can continuously provide power to the Raspberry Pi for a certain period of time in the event of a system power outage, preventing system damage caused by sudden power failures in projects such as routing, where a UPS is necessary for safe shutdown. Additionally, in some mobile projects, such as Raspberry Pi cameras, tablets, and field data acquisition systems, a battery is also required to provide a stable power supply. Color: Black Material: ABS Package Contents: 1*UPS HAT 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.