[AT&T Samsung Galaxy S II Skyrocket SGH-I727] PlagueBoy:
Sorry about that Tony, I was obviously working too fast as I had to head out for a flight and must have copied the same SystemUI.apk to the two zip files accidentally. However, below and corrected in the post above, you will now see the updated links with the new fixed battery Gauge. This should give you a second choice for now.

Gauge Battery Fixed: http://d-h.st/WVC

Jazz Battery: http://d-h.st/GtG

As for making them yourself, I did not use any of the battery tools to create this. Below is a list of the steps that I took to create it. This list seems long but that is probably because I am going step by step through the entire process of doing this manually:

Download or create the battery files that you want included in the SystemUI.apk

Download the rom in which you want to edit the SystemUI.apk

Download apktool 1.4.3 (I actually use the one provided by Wanam here on XDA)

Download apktool 1.4.2 (I will explain why later)

Install Java JDK (if you haven't already)

Extract the apktool 1.4.3 or the Wanam download, whichever you went with. For example using 7-zip and save the extracted folder to the root of C: or Wherever else you would like it to go (spaces in folder names can cause issues so look out for that. I just save mine to C:\Apk_ICS).

Copy the files needed from the rom you want to edit using 7-zip or something like that. In this case you need framework-res.apk, twframework-res.apk and SystemUI.apk extract them to a place you can easily find them/remember where they are for later (I created folders called "Framework" and "Mod" in the "C:\Apk_ICS" folder. This is just my choice. I copied the two framework files to the Framework folder created and the SystemUI.apk to the Mod folder)

Open a CMD prompt and navigate to where you extracted the apktool folder and into the "other" folder (for example: "cd c:\Apk_ICS\other")

Install the Framework. If you followed the steps I have above then you would use this command: "java -jar apktool.jar if C:\Apk_ICS\Framework\framework-res.apk". Do that twice only the second time replace the Framework-res.apk part with twframework-res.apk.

Now decompile the SystemUI.apk you want to mod. Here is where this file became tricky for me. I had to use the Older 1.4.2 Apktool.jar in order to decompile without errors on this rom. To accomplish this I renamed the Apktool.jar currently in the C:\Apk_ICS\other folder to Apktool.bak.jar.

Once decompiled rename the current Apktool.jar to Apktool.old.jar (or something like that) and rename Apktool.bak.jar to Apktool.jar

If you want to make a battery with percentage you need to edit the following xml files (I use the old standby Notepad++):

Continuing with the example your files would be located in the "C:\Apk_ICS\other\SystemUI\res\drawable" folder and they are called "stat_sys_battery.xml" and "stat_sys_battery_charge.xml"

Once you make the required changed and copied the battery image files to the drawable-hdpi folder you can build the project with "apktool b SystemUI"

Before you copy the distribution file (located in the Dist folder under C:\Apk_ICS\other\SystemUI if you are following the examples I gave above) you need to get the file signed. The easy way to do this is to open the original SystemUI.apk in 7-zip or whatever archive app you use and dump the Meta-INF folder and AndroidManifest.xml into your SystemUI\Build\APK folder located in the same location as the dist folder.

Now rebuild the apk using the same command originally used above.

* If your pulling battery files from an existing rom or another SystemUI.apk remember to rename that SystemUI.apk to something like SystemUI_origfile.apk. That way when it is decompiled it won't overwrite the SystemUI folder you actually want to build and use.

** There are plenty of easier ways to do this I am sure, but I find that taking your time and doing this manually once or twice will give one a better idea of what is actually happening.

***Probably not the best explanation and tutorial here, but I have been awake for 56+ hours straight and my brain isn't fully working at the moment. This isn't pretty or quick and I am sure a search will probably yield a easier way, but I am old and like to do things the hard way I guess.