Apple PMU battery

modulename: pmu_battery.ko

configname: CONFIG_BATTERY_PMU

Linux Kernel Configuration
└─>Device Drivers
└─>Power supply class support
└─>Apple PMU battery
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Say Y here to expose battery information on Apple machines
through the generic battery class.

source code:
drivers/power/supply/pmu_battery.c