Waveshare UPS HAT (D)

The UPS HAT (D) is an uninterruptible power supply (UPS) expansion board specially designed for the Raspberry Pi series. Onboard switching Li battery charging chip with path management, boost converter chip, and voltage/current monitoring chip which can monitor the operating state of the batteries via the I2C interface.

• Adopts pogo pins connector design, compatible with Raspberry Pi 3 / 3B+ / 4B, etc.
• Onboard Li battery charging chip, with dynamic path management, more stable power supply
• Onboard boost converter chip for stable 5V power output
• I2C bus communication, monitoring the batteries voltage, current, power, and remaining capacity in real time
• Multi battery protection circuits: over charge/discharge protection, over current protection, short circuit protection, more safe and stable
• Onboard MCU management, supports detecting power connection and booting the Raspberry Pi
• Supports displaying battery level on the system, easy to check the battery remaining capacity
• Onboard LED indicators for monitoring the battery operating status
• Comes with online development resources and manual

Uninterruptible Power

It is able to charge the batteries and provide power output at the same time from external power supply
Automatically switch over to batteries output if external power supply is unavailable, keeps the system running without any trouble 

Dynamic Path Management, More Stable Power Supply

When connected to the external power supply, the system will be powered and the battery will be charged at the same time, and the battery will be disconnected after being fully charged to avoid battery life damaging caused by frequent charging and discharging
When the external power supply is insufficient, the battery will provide power output together with the external power supply at the same time to ensure system normal operation
When the external power supply is connected, the system will keep running normally even when the battery fails or is taken out. And automatically switch over to batteries output if the external power supply is unavailable, keeps the system running without any trouble

Supports 21700 large capacity Li battery, Longer Battery Life

Onboard warning indicators, easy to check if the battery is connected correctly

Pogo Pins connector

Powering the Raspberry Pi via pogo pins, without using any GPIO resource,
compatible with Raspberry Pi 3 / 3B+ / 4B, etc.

Real time monitoring

Monitoring the batteries voltage, current, power, and remaining capacity via I2C.
When the voltage dips too low, it is possible to save files properly and then shut down the system by software, to avoid any data loss

Supports Battery level display and detecting power connection

Easy to check the battery status in real-time, and automatically shutdown when the battery level is low. Onboard MCU chip for detecting power connection and automatically rebooting the Raspberry Pi

Onboard USB interaces

Adopts USB Type-C interface for charging and the USB Type-A interface for 5V power output, convenient for powering other boards