xbattbar is a simple APM battery status displayer on X. People who prefer light-weight window managers like *box or *twm may find it interesting ;) Unfortunately it doesn't run on ACPI machines, but still it is useful for most laptop users. I suggest x11-misc/xbattbar (or maybe app-misc/xbattbar).
Created attachment 12344 [details] xbattbar-1.4.2.ebuild
thanks for the ebuild Mamoru. very well done. commited.