Arrange the demonstration in advance
Ask the seller whether charging can be demonstrated at a suitable location and agree who pays for the session. Establish the charger type and required cable without assuming every accessory is included. Choose an appointment with time for questions. Do not turn the viewing into an improvised range test that deliberately empties the battery.
Look before connecting
Observe the visible condition of the flap, cable and accessible connectors. If you notice damage, corrosion, overheating marks or warnings, do not attempt a roadside repair. Have a qualified specialist assess the issue. Do not touch electrical contacts or open high-voltage components. An accessory fitting a socket physically does not establish that it is suitable for use.
Watch the whole procedure
Ask the owner to demonstrate connection, starting, displayed messages and stopping according to the manual. Check how the connector releases and where to find instructions if connection fails. If an app is involved, ask how access transfers to the next owner without requesting the seller's personal password. Record what was demonstrated and what remains unchecked.
Keep the conclusion proportionate
A session starting does not establish peak charging performance, complete battery health or every charging mode. A lower rate can have several causes and needs context. Arrange a documented specialist assessment when questions remain. At handover, list the cables, approved adapters and other included accessories in writing instead of relying on a promise in the conversation.
