My long range Model Y was built in April, 2021. I believe that when new it had either a 75 kWh or 78 kWh battery (too early for the 82kWh battery). Is there any way of finding out which it was built with? The current battery capacity after 10 months and 16,500 miles is about 71.3 kWh which is either a 5% degradation (from 75kwh) or 8.6% degradation (from 78 kWh). Using the currently indicated 100% range of 299 miles (from 326 originally), that indicates a degradation of 8.3%. I'd like to know where I stand. The indicated 100% range decrease has been very linear at a little less than 3 miles per month with no sign of abating. If this keeps up (I know everyone says it won't), I'll reach the 30% degradation level (228 miles @100%) in about 25 more months or about 36 months after purchase. I've done very little SuperCharging, keep the state of charge generally between 20% and 80%, live in a mild climate (no temperature extremes), and have driven my Y gently (233 wHr/mile average). As a point of comparison, I drove my 2018 Model 3 for 53,000 miles and when I traded it in for the Model Y, it still had an indicated 100% range of 310 miles.