I wish there was some standard to add short term battery capacity for EVs and PHEVs. An e-scooter battery can get most EVs 5 miles down the road. A standardized

I wish there was some standard to add short term battery capacity for EVs and PHEVs. An e-scooter battery can get most EVs 5 miles down the road. A standardized battery pack and wiring harness in the trunk could allow roadside assistance to get you unstrained or rent a bigger pack for road trips. I'm sure OEMs don't want to warranty 3rd party equipment connecting to their vehicles and making charge/discharge, cooling, securing heavy packs, etc. reliable.