DFR0528 UPS HAT for Raspberry Pi Zero DFRobot UPS Hat for Raspberry Pi Zero provides a continuous power supply to prevent system damage and assure a safe shutdown. This DFRobot UPS shield provides a 2A maximum output current to support more Raspberry Pi applications. The UPS HAT features an auto-switching of charge/recharge path that works against the power-down. This UPS shield provides I2C support that reads the battery information. The UPS HAT shield can supply power for applications requiring mobility, such as Raspberry Pi cameras, tablet PC, and field data collection systems.