Uninterruptible Power Supply For Raspberry PiSupports Charging And Power Output At The Same Time, With Dynamic Path Management, Stable 5V OutputComes with online development resources and manualFeatures At A GlanceThe 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 supplyOnboard boost converter chip for stable 5V power outputI2C bus communication, monitoring the batteries voltage, current, power, and remaining capacity in real timeMulti battery protection circuits: over charge/discharge protection, over current protection, short circuit protection, more safe and stableOnboard MCU management, supports detecting power connection and booting the Raspberry PiSupports displaying battery level on the system, easy to check the battery remaining capacityOnboard LED indicators for monitoring the battery operating statusComes with online development resources and manualSpecificationsOUTPUT VOLTAGE5VCONTROL BUSI2CBATTERY SUPPORT21700 Li battery × 2 (in parallel, NOT included)CHARGER SUPPORT5V (Type-C port)DIMENSIONS56 × 85mmMOUNTING HOLE SIZE3.0mmDynamic Path Management, More Stable Power SupplyWhen 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 dischargingWhen 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 operationWhen the external power supply