i tried your minion battery icon today - quite cool taylor. infact, there's a lot of icons to choose from, 800 in fact, if you like pimping your battery. and they all seem to work with 3minit, see here:
first select the circle battery (top of the list) in the 3minit app, it wont work if you've got anything else ticked. also untick use any battery colour option.
then download zip and flash