LiFePO4 Pi 4 UPS Features: 1 LiFePO4 cell 500mA or 1.5A charge current USB C input, up to 3A DPM, but not DPPM IDPM = approx 3A 1x MAX17260 Fuel guage 1x INA219 current sensor for 5V output STM32F030x8 MCU KiCad project See Hardware/. Firmware Todo Raspberry Pi auto-shutdown software Todo