I thought it made that folder automatically but you have to do it yourself. On your internal sdcard make a folder spelt exact:I'm not sure what's the problem, but it seems i can't tick the use batteries in folder from the app. I can't even change the folder location too. Btw, the default icon provided by the apps seems okay with me setting. Thanks for your works.
3MinitBatteryIcons
Once you do that and put icons in the folder you will be able to tick that box. Probably moot point because the system fcs on Q when you use that option.