This is theme for Gauge Battery Widget status bar icon.
More Themes from this family at http://market.android.com/search?q=gbw-theme-family-number-only
More Gauge Battery Widget Themes at http://market.android.com/search?q=gbw-status-bar-icon-theme
Note: You need Gauge Battery Widget 3.0 Pro or newer to use this theme.
Feel free to send email to email@example.com if you have idea for new status bar theme. No response guaranteed but why not try your luck.
Visit http://www.gaugebatterywidget.com/developer.html if you wanna create your own theme.
Keywords: gbw-status-bar-icon-theme, gbw-theme-family-number-only