Owner-tested: This approach was tested by MyBYD’s owner-editor and independently confirmed by other owners. It is not an official BYD repair instruction, and menus can change with model or software version.
Cold weather changes energy use
Low battery temperature, cabin heating, wet roads, wind, speed and short journeys can all reduce distance per charge. That is not enough by itself to diagnose a battery fault.
Practical owner checks
- Pre-condition while connected when the vehicle and charger support it
- Compare similar journeys rather than one dashboard prediction
- Check tyre pressures against the vehicle specification
- Expect a cold battery to reach its strongest rapid-charging rate later in a session
Avoid false precision
MyBYD does not publish a universal winter-mileage figure from anecdotes. The Real Range Lab separates conditions, exact variant and journey mix, and only shows an aggregate after enough moderated reports.
If energy use changes sharply without an obvious weather or journey explanation, document the conditions and ask an authorised repairer to investigate.