GUILLAUMEK  The Calculator is nice, but this one has a few extra features, such as having multiple currency exchange rates available instead of having to switch from one to another every time.  
(Version 0.9.8)

EMERALDION  @KAYHH:

This is the output of ioreg -l -w0 on Intel:

cassiopeia:~ delphine$ ioreg -l -w0 | grep Capacity

| | "CurrentCapacity" = 5474

| | "LegacyBatteryInfo" = {"Capacity"=5474,"Amperage"=143,"Cycle C

ount"=7,"Current"=5474,"Voltage"=12609,"Flags"=7}

| | "MaxCapacity" = 5474

| | "DesignCapacity" = 5500

And this is the output on PPC (yeah, it's different):

maia:~ delphine$ ioreg -l -w0 | grep Capacity

| | | "IOBatteryInfo" = ({"Capacity"=3556,"Amperage"=1392,"Cycle Count"=10

2,"Current"=2808,"Voltage"=12426,"Flags"=838860807,"AbsoluteMaxCapacity"=4400})

| | | | "IOBatteryInfo" = ({"Capacity"=3556,"Amperage"=1392,"Cycle C

ount"=102,"Current"=2808,"Voltage"=12426,"Flags"=838860807,"AbsoluteMaxCapacity"

=4400})

If you're comfortable with that, and you can easily handle the different formats, you won't probably ever need batterystat.  
(Version 1.0)