Nipperoid | # 1 | 2010-05-12, 17:54 | Report

Is there anyway to change the "Disconnect from mains to save power" etc balloons to out own text string?

MohammadAG | # 2 | 2010-05-12, 18:01 | Report

Get the .po files, change the strings then recompile.
(You can decompile the .mo files from /usr/share/locale iirc)