Developer's note:Functions :- Battery Percentage- Battery Voltage- Battery Temperature- Presence of battery- Battery status (Charging or not)- CPU Speed- Presence of a UMD disc- Wlan switch (ON/OFF)- Battery Life (In hours and minutes)- Battery Low/Critical warning. (Low = 5% - 15%, Critical = 0% - 5%)On your XMB (PSP Menu), send your PSP into hold mode (Push the off/on switch down), and the plugin should activate.For some reason, this doesn't work on 2k/3k models with temporary custom firmware. Sorry.Thanks.