Seli MOD503 Manual Download Page 3

Power input: 5Vdc±5%, 

4A

UPS output: 5.1V±5% maximum 8A

UPS charging current: 3A (DC jack)

Terminal battery voltage: 4.24V

Charging threshold: 4.1V

Features

Continuous operation for up to 10~30 hours (depending on the battery type and the
amount of battery used)

Provides a maximum of 5.1V 8000mA backup power

Can work with 1/2/3/4/5/6 18650 lithium-ion batteries

Support 3A fast battery charging

Integrated battery protection circuit

Integrated over-current protection and over-voltage protection

Integrate Maxim's fuel gauge system (read battery voltage and percentage through i2c)

Intelligent automatic charging and discharging

On-board 4 green LEDs indicate battery charging and discharging levels of 25%, 50%,
75% and 100%

The on-board blue LED indicator shows the power on/off status

The on-board button can control the power on/off (short press the button-turn on, press
and hold the button for at least 3 seconds-turn off)

Power loss or power adapter fault detection (LED and GPIO indication)

On-board XH2.54 power output connector for powering other devices

Mounting holes and standoffs provide mechanical stability of Jetson Nano and T208
components

Safety Instructions and Warnings

Lithium polymer and lithium-ion batteries are very unstable. When charging or using
improperly, it may cause fire, personal injury and property damage.

When charging and discharging the battery pack, do not misconnect polarities. Always
check the polarity of the battery connector carefully to ensure "+" to "+" and "-" to "-".

Do not mix or use old and new batteries, or use other brands of batteries.

Lithium batteries have a limited cycle life. Please replace the old batteries with new
ones when they reach the end of their service life or after two years of use (whichever
comes first).

Keep UPS away from children.

Function and Assembly

Relationship between light display and power

Connect with Jetson Nano by 10Pin

Summary of Contents for MOD503

Page 1: ...5 Introduction Designed for Jetson Nano Developer Kit this advanced uninterruptible Power supply UPS module provides up to 5 1V 8000mA backup power for Jetson Nano board With intelligent power managem...

Page 2: ...utomatic startup complete shutdown from software advanced power path management I2C bus communication and onboard LED indicators for monitoring battery capacity It is powered by six 18650 batteries Sp...

Page 3: ...s the button turn on press and hold the button for at least 3 seconds turn off Power loss or power adapter fault detection LED and GPIO indication On board XH2 54 power output connector for powering o...

Page 4: ...Electricity Electricity The number of LED lights on 0 25 1 26 50 2 51 75 3 76 100 4 Connect with Jetson Nano by 10Pin Correctly install six 18650 batteries to the Jetson Nano UPS power board and conne...

Page 5: ...to turn off the UPS short press once to turn on the UPS Battery power and voltage can be read by software 1 First install the pip of Python3 on the Ubuntu system Please run the following command as t...

Page 6: ...ng battery voltage and battery percentage usr bin env python import struct import smbus import sys import time def readVoltage bus address 0x36 read bus read_word_data address 2 swapped struct unpack...

Page 7: ...y bus if readCapacity bus 100 print Battery FULL if readCapacity bus 20 print Battery LOW print time sleep 2 Create a new Bat py file and then run the command in the terminal sudo python Bat py Now yo...

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