Electric vehicle owners are often surprised to find their car’s battery level dropping even while the vehicle sits idle. Known commonly as phantom drain, this loss of charge while parked is an inherent part of operating modern high-tech vehicles.
Several factors typically drive this stationary energy loss. Most modern EVs rely on continuous background systems, including onboard computers, mobile network connectivity, security monitoring, and automated thermal management systems designed to keep the battery at an optimal temperature.
In addition to active electronics, the natural chemistry of lithium-ion cells means a minor amount of self-discharge is expected over time. Knowing how these features draw power can help owners better plan their charging schedules and storage habits.
For a deeper dive into how and why EV batteries lose charge when idle, check the original coverage on Engadget.
