Medium- and long-haul trucks’ daily travel distances as well as operational and logistical considerations around payload capacity, range, and charging times make them particularly hard to electrify. In this topic brief from the American Council for an Energy-Efficient Economy (ACEEE), scope out the advantages and challenges associated with battery swapping as a potential solution to electrify medium- and long-haul HDVs in the United States and learn how this technology could help to scale up and support transportation electrification across the country.