Power Manager by levone is a power saving prx plugin for custom firmware.

Changes:

– added ability to turn on and off maximum brightness.
– added CW-Cheat Companion Mode.
– Greatly optimized code.
– Decreased CPU usage.
– replaced hold start while booting or luanching game to enable – auto-clocker with ability to switch on and off anytime.

http://forums.qj.net/showthread.php?t=145685