Today’s promo on MacUpdate features MiniBatteryLogger 1.6.3 for US$10.95 (42% off, retail $19). MiniBatteryLogger monitors your battery. The Chart shows the graph of charge and amperage over time. Power events are notified by Growl alerts, logged to file with time and date and listed in the Log. Monitoring sessions can be saved to disk for later analysis and managed from the sessions browser. MiniBatteryLogger requires Mac OS X 10.3.9 or later.