[Sony Ericsson Xperia Mini, Mini Pro, Xperia Pro, A] Ticklefish:
<?xml version="1.0" encoding="utf-8"?>
<com.android.systemui.statusbar.StatusBarView android:orientation="vertical" android:background="@drawable/statusbar_background" android:focusable="true" android:descendantFocusability="afterDescendants"
xmlns:android="http://schemas.android.com/apk/res/android">
<LinearLayout android:gravity="center" android:orientation="horizontal" android:id="@id/icons" android:layout_width="fill_parent" android:layout_height="fill_parent">
<com.android.systemui.statusbar.IconMerger android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/notificationIcons" android:paddingLeft="6.0dip" android:layout_width="0.0dip" android:layout_height="fill_parent" android:layout_weight="1.0" android:layout_alignParentLeft="true" />
<LinearLayout android:gravity="center_vertical" android:orientation="horizontal" android:id="@id/statusIcons" android:paddingRight="6.0dip" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_alignParentRight="true" />
<com.android.systemui.statusbar.Clock android:textAppearance="@*android:style/TextAppearance.StatusBar.Icon" android:textColor="#ff00ffff" android:gravity="left|center" android:paddingRight="6.0dip" android:layout_width="wrap_content" android:layout_height="fill_parent" android:singleLine="true" />
</LinearLayout>
<LinearLayout android:orientation="horizontal" android:id="@id/ticker" android:paddingLeft="6.0dip" android:animationCache="false" android:layout_width="fill_parent" android:layout_height="fill_parent">
<ImageSwitcher android:id="@id/tickerIcon" android:layout_width="wrap_content" android:layout_height="fill_parent" android:layout_marginRight="8.0dip">
<com.android.systemui.statusbar.AnimatedImageView android:layout_width="25.0dip" android:layout_height="25.0dip" />
<com.android.systemui.statusbar.AnimatedImageView android:layout_width="25.0dip" android:layout_height="25.0dip" />
</ImageSwitcher>
<com.android.systemui.statusbar.TickerView android:id="@id/tickerText" android:paddingTop="2.0dip" android:paddingRight="10.0dip" android:layout_width="0.0dip" android:layout_height="wrap_content" android:layout_weight="1.0">
<TextView android:textAppearance="@*android:style/TextAppearance.StatusBar.Ticker" android:textColor="#ff00ffff" android:layout_width="fill_parent" android:layout_height="wrap_content" android:singleLine="true" />
<TextView android:textAppearance="@*android:style/TextAppearance.StatusBar.Ticker" android:textColor="#ff00ffff" android:layout_width="fill_parent" android:layout_height="wrap_content" android:singleLine="true" />
</com.android.systemui.statusbar.TickerView>
</LinearLayout>
<com.android.systemui.statusbar.DateView android:textAppearance="@*android:style/TextAppearance.StatusBar.Icon" android:textColor="#ff00ffff" android:gravity="right" android:id="@id/date" android:background="@*android:drawable/title_bar_portrait" android:paddingLeft="6.0px" android:paddingRight="6.0px" android:layout_width="fill_parent" android:layout_height="fill_parent" android:singleLine="true" />
<com.android.systemui.statusbar.BatteryBar android:textAppearance="@*android:style/TextAppearance.StatusBar.Icon" android:gravity="center_vertical" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" />
</com.android.systemui.statusbar.StatusBarView>

Then the simple answer is..you can't. Your battery icon isn't separate from your other status icons. The best you can do here is swap the notification and status icons around. Then the battery icon will be on the left..but so will the WiFi, signal, Bluetooth, etc icons.

There's some debate about whether ICS is better than GB, but there's no doubt that it offers more modding opportunities!