As one of the smallest systems around there are so many amazing things you could do with the Raspberry Pi if it was self-powered and portable. Introducing PiJuice! A fully uninterruptible power supply (UPS) that will always keep your Raspberry Pi powered. The PiJuice HAT is a super-easy way to add a battery backup to Raspberry Pi. Our revolutionary PiAnywhere technology contained in every PiJuice HAT - is the best way to take your Pi off the grid! The real time clock (RTC) on board will let your Pi know what time it is even with no power input or internet connection. Alongside this is an integrated microcontroller (MCU) chip which will manage soft shut down functionality and a true low power deep sleep state and intelligent startup. You will be able to always keep track of the charge levels and other info with the two built-in tri-coloured RGB LEDs, trigger events and scripts with the thre programmable buttons and since the PiJuice will use up to just five of your GPIO pins (just power and I2C), the rest are free to diversify your project. The stacking header allows you to continue to use your existing HATs and add-ons with PiJuice. Onboard 1820 mAh off the shelf Lipo / LiIon battery for ~4 to 6 hours* in constant use! (with support for larger Lipo Battery of 5000 or 10,000 mAH+ to last up to 24 hrs +) A Full Uninterrupted / Uninterruptible Power Supply Raspberry Pi UPS HAT rechargeable battery solution. Our PiJuice Raspberry Pi UPS solution works with.... Raspberry Pi A+ Raspberry Pi B+ Raspberry Pi 2B Raspberry Pi 3B Raspberry Pi 3B+ Raspberry Pi 4B Raspberry Pi Zero Raspberry Pi Zero W Plus any other Raspberry Pi with 40 GPIO Pins Integrated Real-Time Clock Rechargeable battery for the Raspberry Pi Onboard intelligent on/off switch Low power deep-sleep state with wake on interrupt/calendar event Programmable multi-colored RGB led (x2) and buttons (x3) with super simple user-configurable options Hardware watchdog timer to keep your Raspberry Pi on and working in