I use to use the icons from the XDA show thread and i would flash them with metamorph. Worked literally everytime for me. If you download Metamorph you also need to join the XDA forums and download the file named "scbm_A_white_number.zip". You can find that file by google searching "super circle battery" and click on the first link. It should be an XDA link. One you get on the page posted below you can download the file i mentioned above after logging in to your account. Once you have it downloaded launch the Metamorph app and select extract new .zip. That choice will be at the bottom of the metamorph screen. Once you click that you can scroll down to the downloaded folder and extract the .zip file and install it. Then your phone will reboot and switch icons.
Also it helps if you google search "super circle battery" on your phone and go to the first link and scroll down until you see the file that i named above and download it straight to your downloads folder. to download it all you have to do it click on the .zip file and it will prompt you to log in to your account and once you log in the .zip file will be downloaded to your download folder on your phone.
Hope this can help out and the XDA page link is below.
[MOD][24th-Feb] ★ Super Circle Battery with % ★ Version A-O & Z (Custom) ★ - xda-developers