Version: 4.1 RC1 (using KDE 4.0.98) Installed from: Ubuntu Packages OS: Linux Using KDE 4.1 RC 1. Try resizing the Battery Monitor plasmoid. For me the battery life (percent) display shows up, but does not disappear when you have resized the plasmoid to your liking. The percentage, eg "100%" just stays there. In the settings to display the percentage - it is unchecked. From memory this did not happen with previous versions so it may be a slight regression. HTH
I might add you don't need to resize it, just hover over and the percent charge will not go away when you move the pointer away.
seems to work well these days =)