Found at boot: 
ACPI: Battery Slot [BAT0] (battery present)
ACPI: Battery Slot [BAT1] (battery present)

But no run-time information:

$ cat /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         0 mWh
last full capacity:      0 mWh
battery technology:      non-rechargeable
design voltage:          0 mV
design capacity warning: 0 mWh
design capacity low:     0 mWh
capacity granularity 1:  0 mWh
capacity granularity 2:  0 mWh
model number:
serial number:
battery type:
OEM info:

$ cat /proc/acpi/battery/BAT0/state
present:                 yes
capacity state:          ok
charging state:          unknown
present rate:            0 mA
remaining capacity:      0 mAh
present voltage:         0 mV

Attached dmidecode ouput (which shows the battery info)