That's great, thank you!
Anyway, let me drop a little hint: it might happen that after 2 minutes of inactivity, your GPSMAP 67 may be switched off and gone into an 'expedition mode', lost track points details which are recorded just every 10 minutes since then.
Therefore, can you check the track record registered in you 'window's sill' test afterwards? I just wonder if all 1 sec. points were being recorded.
Also, let me mention a YT test on which at timecode 12:45 author mentioned also 2% battery drain per each 2 hours on the 'window's sill' test but for the previous GPSMAP 66i unit!
Link to the GPSMAP 66i battery test:
Spoiler
Truthfully saying, this video is the real reason why I am doubtful about how Garmin starter to claim 'battery life' for new handhelds 67 and eTrex SE. I might be wrong, but it seems that rights now it may not reflect real field condition (e.g. detailed GPS tracking)...
Couldn't it be possible for you to provide real 'field battery test' and compare the results from the 'window's sill' test?