you can but you have to make your own modifications to the systemUI.apk. since frameworks are not the same you might get bootloop or not work at all...
EdisDee I made a working mod for 2.0.2 version you can use: http://db.tt/4lFAAZ8N
Could you make the same version but with circular battery? I would really appriciate it, cuz your mod is the only which keeps power widget workable after flashing the mod