1. Using spring thimble interface design, suitable for Raspberry Pi Zero series motherboards 2. The onboard lithium battery charging chip supports dynamic path management and the power supply is more stable 3. The onboard boost chip can provide a stable 5V voltage output 4. It can communicate through the I2C interface, measure battery voltage, current, power and remaining power and other parameters, and detect the working status of the module in real time 5. The onboard battery protection circuit prevents overcharge, overdischarge, overcurrent and short circuit, and the work is stable and safer. 6. Onboard charging indicator, easy to check the battery working status UPS HAT(C) is an uninterruptible power supply (UPS) expansion board specially designed for Raspberry Pi Zero series, onboard switching lithium battery charging chip with path management, boost chip and voltage and current monitoring chip, which can pass 12C interface Monitor battery working status. Product parameters: Product name: UPS power supply module Output voltage: 5V Charging power supply: 5V Control interface: I2C Battery specification: 803040 polymer battery 1000mAh 3.7V Through hole diameter: 3.0mm Colour: blue Material: PCB+metal Size: 65 x 30mm Package Contents: 4 x UPS module 4 x lithium battery 4 x screw pack 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.