alan@intrepid:~$ hal-find-by-capability --capability "battery" | xargs -n 1 hal-device
udi = '/org/freedesktop/Hal/devices/computer_power_supply_battery_BAT1'
  battery.reporting.rate = 10111  (0x277f)  (int)
  battery.is_rechargeable = true  (bool)
  battery.rechargeable.is_charging = true  (bool)
  battery.rechargeable.is_discharging = false  (bool)
  battery.reporting.current = 24895  (0x613f)  (int)
  linux.hotplug_type = 2  (0x2)  (int)
  info.subsystem = 'power_supply'  (string)
  battery.reporting.last_full = 47152  (0xb830)  (int)
  linux.subsystem = 'power_supply'  (string)
  info.product = 'G71C0004S610'  (string)
  battery.charge_level.current = 24895  (0x613f)  (int)
  info.capabilities = { 'battery' } (string list)
  info.udi = '/org/freedesktop/Hal/devices/computer_power_supply_battery_BAT1'  (string)
  battery.charge_level.last_full = 47152  (0xb830)  (int)
  battery.charge_level.design = 50760  (0xc648)  (int)
  battery.charge_level.rate = 10111  (0x277f)  (int)
  battery.charge_level.percentage = 52  (0x34)  (int)
  battery.remaining_time = 7924  (0x1ef4)  (int)
  info.category = 'battery'  (string)
  battery.type = 'primary'  (string)
  battery.reporting.technology = 'Li-ion'  (string)
  battery.technology = 'lithium-ion'  (string)
  linux.sysfs_path = '/sys/class/power_supply/BAT1'  (string)
  battery.model = 'G71C0004S610'  (string)
  info.parent = '/org/freedesktop/Hal/devices/computer'  (string)
  battery.vendor = ''  (string)
  battery.voltage.design = 10800  (0x2a30)  (int)
  battery.voltage.unit = 'mV'  (string)
  battery.reporting.design = 50760  (0xc648)  (int)
  battery.reporting.unit = 'mWh'  (string)
  battery.serial = '2100214923'  (string)
  battery.present = true  (bool)
  battery.voltage.current = 11260  (0x2bfc)  (int)

udi = '/org/freedesktop/Hal/devices/computer_power_supply_battery_BAT2'
  battery.reporting.rate = 10107  (0x277b)  (int)
  battery.is_rechargeable = true  (bool)
  battery.rechargeable.is_charging = false  (bool)
  battery.rechargeable.is_discharging = false  (bool)
  battery.reporting.current = 1362  (0x552)  (int)
  linux.hotplug_type = 2  (0x2)  (int)
  info.subsystem = 'power_supply'  (string)
  battery.reporting.last_full = 39873  (0x9bc1)  (int)
  linux.subsystem = 'power_supply'  (string)
  info.product = 'G71C0006K210'  (string)
  battery.charge_level.current = 1362  (0x552)  (int)
  info.capabilities = { 'battery' } (string list)
  info.udi = '/org/freedesktop/Hal/devices/computer_power_supply_battery_BAT2'  (string)
  battery.charge_level.last_full = 39873  (0x9bc1)  (int)
  battery.charge_level.design = 43200  (0xa8c0)  (int)
  battery.charge_level.rate = 10107  (0x277b)  (int)
  battery.charge_level.percentage = 3  (0x3)  (int)
  info.category = 'battery'  (string)
  battery.type = 'primary'  (string)
  battery.reporting.technology = 'Li-ion'  (string)
  battery.technology = 'lithium-ion'  (string)
  linux.sysfs_path = '/sys/class/power_supply/BAT2'  (string)
  battery.model = 'G71C0006K210'  (string)
  info.parent = '/org/freedesktop/Hal/devices/computer'  (string)
  battery.vendor = ''  (string)
  battery.voltage.design = 10800  (0x2a30)  (int)
  battery.voltage.unit = 'mV'  (string)
  battery.reporting.design = 43200  (0xa8c0)  (int)
  battery.reporting.unit = 'mWh'  (string)
  battery.serial = '0000000612'  (string)
  battery.present = true  (bool)
  battery.voltage.current = 11350  (0x2c56)  (int)