Morill also added that Tesla is in the process of developing new chargers with a longer cord for non-Tesla EVs

Tesla recommended against using extension cords and unapproved charging adapters and, in some cases, even sued producers of such devices, citing safety reasons

Tesla’s Cybertruck engineer issued a stern warning: using extension cords at Superchargers isn’t just risky—it’s a recipe for disaster.

General Motors Co. said Wednesday it will offer access to more than 17,800 Tesla Inc. superchargers through a $225 NACS DC adapter that it has approved for use with its electric vehicles (EVs). The move is part of an effort by the auto giant to provide access to more than 231,

"Enabling access to even more publicly available fast chargers represents yet another way GM is focused on further improving the customer experience and making the transition to electric more seamless,