How to Retrieve Your Public IP Address Using Batch Scripting
This blog post could provide a step-by-step tutorial on how to use the batch script to retrieve your public IP address

Result
PS C:\Users\Dev\Desktop> .\GetMyIP.bat % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 55 0 55 0 0 137 0 --:--:-- --:--:-- --:--:-- 137 My IP address: 35.xxx.xxx.xxx