One Laptop Per Child battery

modulename: olpc_battery.ko

configname: CONFIG_BATTERY_OLPC

Linux Kernel Configuration
└─>Device Drivers
└─>Power supply class support
└─>One Laptop Per Child battery
In linux kernel since version 2.6.24 (release Date: 2008-01-24)  
Say Y to enable support for the battery on the OLPC laptop.

source code: