You know what would be the best?
This theme with Fresh UI's battery icon. Is it possible? If so, how can I go about doing that? Since I'm on Liberty v0.5, Fresh UI is a no go for me.
Metamorph would be the way to go, I wrote up a length description of how to go about something similar to this here: http://www.droidforums.net/forum/liberty-rom-dx/152854-lock-screen-help.html
You'd want to focus on the stat_sys_battery_%.png files in this case which are in framework-res.apk/res/drawable-hdpi/. Download the FreshUI Theme and use the framework.apk from it to get the battery icons you'd like to use.
Let me know if you have questions about accomplishing this.