The X728 is an advanced uninterruptible power supply expansion board for all current models of the Raspberry Pi (Raspberry Pi 4B/3B+/2B/B+) using a 40 pin header. It provides 5.1V 8000mA Power Backup for even the most demanding Raspberry Pi set UPS, intelligent and safe power management, safe shutdown, AC power loss/ power adapter failure detection, auto power-on, full poweroff from software, and a real- time clock. The X728 reserves the 40-pin header that can be stacked with other Raspberry Pi accessory boards for enhanced applications. The X728 can also be used with the X825/X828/X829 ( 2.5" HDD/SSD Shield) and X857/X862/X872 (MSATA/M.
2 SSD shield) for safe data backup.