Unlike magic, which seems to be a field (re?)discovered by the post-Rash humans almost from scratch, most of the technology they use is based on preserved knowledge, and often retrofitted items. One area where obviously some major progress has been made are batteries, matching the switch of the primary energy used from crude-oil-based to electricity obtained from geothermal and hydroelectric sources. Batteries have thus become suitable to powering various vehicles, including some that keep going for days (almost-)nonstop between reloads.
Where the Icelanders and Norwegians are a bit picky about the technology of old that they use, wary of its strong role in the pre-Rash world and its possible role in bringing the apocalypse about, the Swedes and Danes are more enthusiastic about preservation of technology, and the Finns are somewhat lagging behind - probably not by choice, though.