Note:
Do not power the Raspberry Pi through a Micro USB socket or Type-C socket.
Do not use 18650 battery with built-in protective circuit.
Overview:
The X728 is a premium uninterrupted power supply expansion board for the current Laspberry Pi 4B / 3B + / 2B / B + ) that uses a 40-pin header.
Provide 5.1V 8000mA power backup for your Pi set UPS and support intelligent/safe power management, auto startup, safety shutdown, AC power off/adapter failure detection, software full power off and real-time clock (RTC) function.
The X728 has a 40-pin header that can be stacked with other expansion boards for Lazpie for enhanced applications;
The X728 can be used with X825 / X828 / X829 (2.5" HDD / SSD Expansion Board) and X857 / X862 / X872 (MSATA / M.2 SSD Expansion Board) for safe data backup.
Features:
Powerful intelligent uninterrupted power supply (UPS)
Can be operated continuously from 10 to 30 hours (depends on battery type and quantity)
Allows 5.1V 8000mA power backup even in demanding RPi setups
Supports 3000mA high-speed battery charging
Integrated over-current protection and over-voltage protection
Maxim remaining gauge system (read battery voltage and percentage by i2c)
10-A Fully Integrated Sync Boost Converter
Intelligent Auto Charging & Discharge
Green LED on the board, indicating the battery charge level and discharge level is 25%, 50%, 75%, 100%
Intelligent & Safe Power Management
Momentary button for convenient power control
Press the button to turn on
Press and hold the button for 1-2 seconds to restart
Press and hold the button for 3-7 seconds for a secure shutdown
Press and hold the button for more than 8 seconds to force shut down.
Supports software safe shutdown and full power off
The blue LED on the board indicates the status of power on, restart, and shutdown
AC power off and adapter failure detection (LED and GPIO detection).
The pin header on the board allows you to choose the automatic power on when it is powered
Automatic safety shutdown when battery is low (voltage <3.0 V)
Ultra low standby power consumption for maximum battery life
It can operate in both charging mode and boost mode for complete system management and battery power management
Integrated IN-to-SYS pass-through pass-through input voltage to system
Advanced system power pass management prevents battery from charging and discharging
Advanced system power pass management allows 3A fast charging and simultaneously power the Raspberry Pi
Integrated hardware DS1307 real-time clock (RTC) with battery backup
Track time when Raspberry Pi is turned off
Allow the Raspberry Pi to search for the date and time at the time when restart
18650 battery maintains the day and time - no additional battery needed
Packing List:
1x X728 Expansion Board
8x Screw M2.5 *5mm
4x Spacer M/F M2.5 *20mm
4x Spacer F/F M2.5 *20mm
3 x Jumper Link Pitch 0.1 inch (2.54 mm)