It would be nice for budgeting power to know how much each module drains in current. The info could be included in the "Product Specifications" section on each module's web page. Here are some current consumption numbers that I have observed.
bargraph 26.4 ma
number 19.47 ma
dimmer 0.64 ma
dimmer+servo (analog mode) 13.6 to 70 ma
dimmer+servo (pwm) 13 to 25 ma
dimmer+number+servo(analog) 0v 47ma, 1v 50-60ma, 2v 65-70ma, 4v 68-78ma, 5v 67-96ma
arduino 33ma with bargraph on (d5 HIGH) 57 ma
cloudbit (low power,default, 247MHz) 280ma (155 ma "steady state")
cloudbit (hi power, 454Mhz) 402ma (steady 166 to 242ma)
More power info (revised) at
https://github.com/manitou48/littlebits/blob/master/power.txt