UPS Power Module

From Waveshare Wiki
Revision as of 10:30, 20 October 2023 by Eng52 (talk | contribs) (→‎Introduction)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
UPS Power Module
UPS Power Module

UPS Power Module for Jetson Nano Developer Kit.





UPS Power Module For Jetson Nano, 5V Uninterruptible Power Supply, Multi Battery Protection Circuits.


  • I2C bus communication, monitoring the battery's voltage, current, power, and remaining capacity in real-time.
  • 0.91" OLED for displaying info like battery voltage, IP address, RAM usage, etc.
  • Multi battery protection circuits: overcharge/discharge protection, over current protection, short circuit protection, and reverse protection, along with the equalizing charge feature, are more safe and stable.
  • Onboard 5V regulator, up to 2.5A continuous output current.
  • Batteries warning indicators, easy to check if the battery is connected correctly.


  • Output Voltage: 5V
  • Charger: 8.4V 2A
  • Control bus: I2C
  • Supported battery: 18650 Li battery (NOT included)
  • Battery capacity: 4x batteries 10400mAh
  • Dimension: 113mm × 79mm
  • Mounting hole: 2.5mm


UPS-Power-Module-3.jpg UPS-Power-Module-4.jpg
The 8.4V interface is the charge port. You can plug the 8.4V 2A charger provided for charging the batteries.
The switched is the power switch, you can turn it into ON/OFF to turn on/off Jetson Nano Developer Kit
WARNING LED are the indicators of batteries, they turn on if you reverse batteries.
Note 1: Please check the WARNING LED when you mounting batteries, make sure that you set all the batteries in the correct way. You cannot charge batteries if you reverse them.
Note 2: The board may not work when you mount the batteries for the first time, you need to charge batteries on board for a while to activate them.
Note 3: Please use the charger provided, the module may be destroyed by other unsuitable power adapters/chargers.


  • Li-ion and Li-po batteries are quite unstable. They may cause fire, personal injury, or property damage, if they're not properly recharged or used.
  • Do not reversely connect the polarities when recharging or discharging the battery. Do not use inferior charger/charging panel to recharge the battery.
  • Do not mix use old batteries with new ones, avoid using batteries of different brands.
  • When buying Lithium battery, should always make sure the battery specification is compatible with the expansion board. Choose batteries from formal manufacturer, and ensure the batteries will work stably and safely by aging test.
  • Lithium batteries have limited cycle life, they will also deteriorate as time goes by. Should be replaced with new ones when the batteries reaching their max cycle life, or working over two years, whichever comes first.
  • Should be placed carefully and properly, keep it away from inflammables and explosives articles, away from children, avoid any safety accident caused by careless storage.

How to use

You should connect the UPS Power Module with your Jetson Nano Developer Kit by the 6PIN cable. You should connect 5V to 5V, the 3.3V to 3.3V, otherwise, you may destroy the Jetson Nano Developer Kit because of the wrong connection.
UPS Power Module 1.png
Open a terminal and install the display code by the following command. The codes are used for display information on OLED like the voltage, current, etc.

sudo apt-get install python3-smbus -y
sudo apt-get install python-smbus -y
git clone
cd UPS-Power-Module
sudo ./

OLED will display the IP address, battery voltage, current, and the percentage of battery quantity, as well as the CPU, GPU, and memory information after starting the server.
Note: if the current value is negative, it means that the batteries are feeding the Jetson Nano Developer Kit. If the current value is positive, it means that the batteries are charging.

If you want to print the battery information to the terminal you can refer to the following script.

The script can be run by the following command.

python3 -m ups_display.ina219

The information printed should be as below


Demo codes

3D Drawing



sudo python3 -m ups_display.display_server

If you can display the circuit by running this command, there is no problem. There should be a problem with the boot service, you can run the following two commands to uninstall and reinstall it.

sudo systemctl disable ups_display
sudo pip3 uninstall ups_display


Standby state, about 10-12 hours; other cases have not been specifically tested.


When reconnecting the battery, it needs to be connected to the power supply to work properly.


The module supports a maximum current of 2.5A and can be used in max mode.


Module power-off charging takes about four hours (the switch is on the OFF side).



Technical Support

If you need technical support or have any feedback/review, please click the Submit Now button to submit a ticket, Our support team will check and reply to you within 1 to 2 working days. Please be patient as we make every effort to help you to resolve the issue.
Working Time: 9 AM - 6 AM GMT+8 (Monday to Friday)