PSPInformation is a plugin which shows you various information about your PSP.

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%)

http://www.psp-hacks.com/forums/f141/pspinformation-plugin-release-t251364/