Monitoring battery status from Android devices

Are there any easy-to-understand guidelines for how to get battery status from Android devices? I understand I must use Tasker and HTTP requests somehow, but I’m not yet very familiar with Tasker.

Also, I would like to be able to see battery status of my children’s tablets. Could/should I install SmartThings and Tasker on them too and login with my SmartThings credentials? As they are below 13 I can’t create Samsung accounts for them.