BatteryMonitor, EcoHack, and Voltage Control Hack
BatteryMonitor shows battery power consumption and life expectancy. EcoHack saves 30-40% of your battery by lowering the PalmPilot system clock speed to 10 MHz from 16 MHz. Switchable between normal and Eco-mode with a stroke. VoltageControl displays a tiny battery symbol in all apps. Hacks by Peter U. Strobel. With warning notes on compatibility issues.