Power Management IC for LG G4 / Sony Xperia Z3. The power management IC manages, distributes, and supplies the voltage from the battery source to other respective circuits or chips. If the power management IC is not functioning properly, it can be replaced with this IC for LG G4 / Sony Xperia Z3. Port Marking: PM8994. Professional installation is recommended. Each piece has been tested before shipping. Compatible with PM8994.