Overview The UPS HAT (E) is an uninterruptible power supply (UPS) expansion board specially designed for Raspberry Pi series. Onboard battery fuel gauge IC, fast charging chip and high-power buck chip to realize higher power input and output. Supports monitoring the operating state of the HAT via the I2C interface. Package include The 21700 batteries are NOT included 1. UPS HAT (E) x1 2. Acrylic protection panel x1 3. Screws pack x1