Iura, The timer board only draws around 60 mah from the battery. The CDI HV board however can draw from 200 to 250 mah from the battery. I normally use a 700mah to 900mah pack to power my engine test stand. I was getting about a 2 hour run from it before it's voltage drops below what is required to run the system.
Since I use only a 4.8 volt pack, I omitted the regulator chip and jumpered the board to take it's place.. and that is why the current draw is lower than most commercial systems. This depends on engine rpm and condition of the battery. The CDI will draw more current at higher rpms. Typically, 175 to 200mah at idle speeds, and up to 250 to 300 @ 7000 rpm. I feel that these readings are very good for the boards in combination. The harder you make the CDI work to produce voltage, the higher the current draw. This is typical of all CDI units. I feel that the toroid transformer is the most efficent for our purposes, although you can use what you like.... I prefer the toroids.

John