Can the SK636 or SK638 be shipped by air? Yes, they can be shipped by air. The battery in them is suitable for air transportation. Read more here: MSDS-DIAMEC-SLA-(By-air)-2012-R.pdf MSDS-DIAMEC-SLA-(By-sea)-2012-R.pdf MSDS(OREMA).pdf FAA-airline-passengers-and-batteries.pdf