gkrellm-ThinkBat is meant as a replacement for the default battery meter in Gkrellm Gkrellm. It should look like default, only it optionally shows time remaining/power consumption.
Latest version: 0.2 (2006-02-06)
Download the tarball.
$ make install
this istalls gkrellm-thinkbat.so to ~/.gkrellm2/plugins. You can copy it manually elsewhere.