Transflective MIP reads sharpest in full sun and sips power all day. In the dark, a backlight on demand — light when you ask for it, battery when you don't.
A physically bigger cell than the standard Adventure carries — the longest battery in the line even with no sun at all. Through a polar night, Expedition mode still runs for months without a charger.
Up to 30% more battery in normal use — and in Expedition mode (one GNSS fix per hour), battery is unlimited on 4–6 hours of sunlight a day: 4 h on the 51 mm, 5 h on the 47, 6 h on the 43.