You would expect some reduction in charge capacity for any rechargeable cell. Laptops and phone do exactly this. There may be other things going on as well.Charging patterns affect battery life and there will be software between the battery and the user so it wouldn’t surprise me to find an algorithm that encourages early recharge to maintain good battery life.
Armstrong when landing on the moon with fuel gauges showing near empty is reputed to have said ‘there is always a bit left in the tank’ !

Think I’d rather chance it on Terra Firma rather than Terra Lunar🥴

. . . as just been said it’s cold.

It’s the weather. Cold weather means more energy consumed for heating and de-misting. Additionally charging and discharging efficency is poorer with cold cells.

EV batteries have longer lives than things like phones and laptops. This is because of careful charge / discharge management. They do not “fully” charge or discharge tha battery to rated capacity. This slightly reduces range but greatly increases life.

Robert.

Thing to note is “average loss”

Most EV and hybrid appear to be lease, where use and charging is more likely to be “optimum”

I’ll stick with my petrol car, even at 24mpg, I can put 300 miles in the tank in a few minutes, rather than hours….

Jimb

Winter time is the reason. Cold temps, more power usage for lights, heater, wipers as has been said. I lose about 20 to 25% range when its cold. EVs also have a winter mode for battery heating to improve performance and that also uses power.