[zeus@olympus ~]$ cat /proc/acpi/battery/BAT0/state
present:                 yes
capacity state:          ok
charging state:          charged
present rate:            1 mA
remaining capacity:      4800 mAh
present voltage:         12535 mV
[zeus@olympus ~]$ cat /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         4800 mAh
last full capacity:      4622 mAh
battery technology:      rechargeable
design voltage:          11100 mV
design capacity warning: 480 mAh
design capacity low:     145 mAh
capacity granularity 1:  48 mAh
capacity granularity 2:  48 mAh
model number:             DELLUD2646
serial number:           880
battery type:            LION
OEM info:                Sanyo