X720

Overview

The X720 is a multi-functional expansion board for all current models of the Raspberry Pi using 40 pin header.It provides intelligent and safe power management, remote power on/wake on lan, safe shutdown and full poweroff through software, an advanced uninterruptible power supply, second 10/100M fast ethernet, and a real- time clock. The X720 reserves the 40-pin header that can be stacked with other Raspberry Pi accessory boards for enhanced applications. The X720 can also be used with the X820 (2.5" HDD/SSD Shield) and X850 (Msata SSD shield) for safe data backup.

Safety Instructions and Warnings

You must read these safety instructions and warnings before charging your batteries.
Lithium Polymer and Li-ion batteries are volatile. Failure to read and follow the below instructions may result in fire, personal injury and damage to property if charged or used improperly.
Never make wrong polarity connection when charging and discharging battery packs. Always double check polarity of battery's connector to make sure "+" to "+" and "-" to "-".
Do not mix and use old batteries and new batteries, or batteries with different brand names.
Lithium batteries has it's cycle life, please replace old battery with new one when it reaches it's service life or when it is two year old, whichever comes first.
When charging Battery Pack, please put battery in a fire proof container. Please don't leave the X720 on the wood material or carpet and unattended.
Must keep the X720 away from children.

WARNING:

DO NOT APPLY POWER TO YOUR RASPBERRY PI VIA THE PI's MICRO USB SOCKET.
DO NOT USE 18650 BATTERY WITH BUILT-IN PROTECTION CIRCUIT
DO NOT APPLY POWER TO X720 VIA THE X820's MICRO USB SOCKET AND DC JACK AT THE SAME TIME.

Battery Recommend for X720 board, please refer to: File:NCR18650B.pdf

Features

Smart Uninterruptible Power Supply (UPS)

Provides continuous operations for up to 10hours (depending on battery type used)
5.1V 3000mA Power Backup for even the most demanding Pi 3 set ups
18650 dual Cells Lithium Ion Holder
Can work with single or dual 18650 Lithium Ion battery
Integrated battery protection circuit
Integrated over current protection and over voltage protection
Intergrated Maxim's fuel-gauge systems (Reading battery voltage and precentage via i2c)
Intelligent automatic charging and discharging
Automatic safe shutdown when battery low (voltage <3.0V)
On-board LED blinking when the battery condition low (voltage <3.0V)
On-board LEDs show the status of battery charging and discharging

Intelligent and safe power management

Press the power button to turn on
Press the button and hold for 1~2seconds to reboot
Press the button and hold for 3~7seconds for safe shutdown
Press the button and hold for >8seconds to force shutdown
Supports safe shutdown and full poweroff through software
On-board LED shows the status of power on, reboot and shutdown

Integrated second 10/100M fast ethernet

Supports remote power on/wake on lan via Link-change, Magic packet, MS wakeup frame
On-board LED shows the status of power on/wakeup packet indication

Integrated Hardware Real Time Clock (RTC) with Battery Back-Up

Keeps track of the time while the Raspberry Pi is switched off
Allows the Raspberry Pi to retrieve the current date and time when it is switched back on
Uses the most precise DS3231 RTC real time clock
Uses the 18650 battery to maintain the date and time - no additioanl battery required

Reserved 40-pin stackable Header for Add-On Boards

Powers the Raspberry Pi via the 40-pin header - no additional cabling required
Works with all current models of the Raspberry Pi using a 40 pin header
Power management and second ethernet can still work without battery
On-board DC jack (5.5*2.5mm) and micro-USB socket convenient for power input
On-board connector allowing to connect external power switch and DIY your perfect case
Mounting holes and standoffs provide mechanical stability of the Raspberry Pi and X720 assembly

Operating System

Raspbian Stretch
Safe shutdown function tested for Raspbian, other operating systems to be tested and advised

Technical Specification

Power supply: 5.1Vdc，2.5~4A
UPS output: 5.1V 3A
UPS charging current: 2.5A
Terminal Battery Voltage: 4.2V
Recharge Threshold: 3.99V

X720 Case

X720 RPi Desktop Computer Kit Case

Please refer to X720 Case

Document

x720-script on Github

# x720-script
Shell script for X720, include safe shutdown and real time clock script.

NOTE:
We test this shell script base official Raspbian '2018-11-13-raspbian-stretch.img' version;
How to use?

step 1:
wget https://raw.githubusercontent.com/geekworm-com/x720-script/master/x720.sh
sudo chmod +x x720.sh
sudo bash x720.sh

step 2:
printf "%s\n" "alias x720off='sudo x720shutdown.sh'" >> ~/.bashrc

step 3:
sudo reboot

Hardware and Function Description

Please refer to : Hardware and Function Description

Software Guide

Please refer to Software Guide

FAQ

1. Why the CHG LED blinking?

(1) The light flash is due to excessive charging for long time.

(2) The battery won't be fully charged due to charging for long time (4.2V when fully charged)

(3) Please try to disconnect the power and full discharge the battery (work until the battery is competely out), then connect the power to power it.

(4) Because there are so many kind of batteries, and the quality is also various. So we suggest to use the NCR18650B from PANPASONIC.

2. How to read X720 battery voltage and percentage?

The X720 board use Integrated Maxim's fuel-gauge systems (Reading battery voltage and percentage via i2c).Please refer to X720 software.

9> Reading battery voltage and percentage

	pi@raspberrypi ~ $  sudo python x720ups.py

3.We get one feedback that the X720 board immediately shuts the Pi down if you lose AC power to the wall-wart power supply that's powering the device.

But we have done a test the Raspberry Pi board and X720 UPS will not shutdown and restart.Please refer to this video: X720 UPS Test

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Anonymous user #10

59 months ago

Score 0

how much is the maximum in amp output of the board. in the characteristics they only indicate the input consumption, but not output to the raspberry. I want to guarantee that it doesn't go out.