Pandora System Info by Jon Sneyers is a ridiculously accurate battery information, so you can actually see exactly how fast the battery is (dis)charging and exactly how many micro Ampere hours it has left. Also contains a simple CPU usage monitor (including info on power-saving C-states), a simple SD card free space pie graph display, and network statistics.
Changes:
– various small tweaks and bugfixes
– root password no longer needed to set CPU speed or toggle wifi
– Memory panel (RAM, swap, top memory eaters) – decoupled from Storage panel
– showing USB sticks in Storage panel, toggle USB there
– CPU panel now distinguishes user/system/iowait
– Logfile plot comments, improved plot templates