This appears to be an exaggeration that’s making its way around less scrupulous news sources. From https://www.euronews.com/my-europe/2023/12/30/was-oslo-paraly

This appears to be an exaggeration that’s making its way around less scrupulous news sources. From https://www.euronews.com/my-europe/2023/12/30/was-oslo-paralysed-after-all-of-its-electric-buses-broke-down-due-to-the-cold https://www.euronews.com/my-europe/2023/12/30/was-oslo-paral... : a spokesperson called the allegations “an extreme exaggeration… We cancelled, on average, between 50 and 100 departures, out of more than 4,000 daily departures, for a few days.” The company did however admit they had a few “challenges with the range of the buses being shorter in cold weather." "We solved this by changing the charging shifts. And also by fixing the charging infrastructure." Ruter [the bus operating company] claims the issues have since been fixed and the fleet of electric buses continues to run as usual.