Power usage: compare to OMB

[gauteh]

Waiting for the batteries to run out is a bit inefficient.. Ideally we would do some current measurements with the currentranger on the original OMB. If @jerabaul29 has some current measurements from before we can try to replicate that.

[jerabaul29]

See Table 1 of https://www.researchgate.net/publication/357712696_OpenMetBuoy-v2021_an_easy-to-build_affordable_customizable_open_source_instrument_for_oceanographic_measurements_of_drift_and_waves_in_sea_ice_and_the_open_ocean :) . I had only done simple measurements with a multimeter, I do not have fancy equipment for logging power consumption yet, but I think this should be enough to give a general idea :) .