Maxim MAX17040 Fuel Gauge

modulename: max17040_battery.ko

configname: CONFIG_BATTERY_MAX17040

Linux Kernel Configuration
└─>Device Drivers
└─>Power supply class support
└─>Maxim MAX17040 Fuel Gauge
In linux kernel since version 2.6.31 (release Date: 2009-09-09)  
MAX17040 is fuel-gauge systems for lithium-ion (Li+) batteries
in handheld and portable equipment. The MAX17040 is configured
to operate with a single lithium cell

source code: