Fix battery 🔋 info

Some of the user who had a battery setup were not able to retrieve data from saj anymore for the battery systems.

This had to do with an api/website change on SAJ's side. Thanks again to @jaesbit and @walkjivefly for troubleshooting this and creating an update for the custom integration.

Thank you! Hope this solves all the current issues with the battery system. If you still have an issue use the existing issue on github to post your findings and logs. Also if you know how to get more information from their api you can create a pull request to make this custom integration even more cool 😎