Lease Return - check a used EV's battery before you make an offer

Buying a used electric car, maybe a fresh lease return? Type what the listing and the car's own screen say and a window sticker of estimates fills in free in the browser: battery health from a report or the range screen against a typical fade for the age and miles, range today in mild weather, winter and at highway speed, price per remaining kWh, battery warranty left and listing words worth a question, plus an offer ladder with a precise last number. A metered battery check reads it into go / inspect first / walk away with seller questions, test-drive checks and leverage; a metered offer script turns the ladder into words to say. Built on @personamanagmentlayer/automotive-expert and @wondelai/negotiation. Every number is an estimate, not an inspection.