I don't know if the board has it, but it would be a good idea to have a jumper that, when removed, allows to connect a tester to measure the current consumption. But, important, only the consumption of the ARM and peripherals connected to the buses, but not the USB programming chip, LEDs and other things (this is: everything that in a "production device" you won't have), and thus allow to use this as a testbed/development board for low-power devices.