What parking mode does
A compatible dash camera can continue monitoring after the ignition is switched off. Depending on the camera, that may include motion detection, impact detection, time-lapse recording or an energy-saving mode.
Hardwire kit vs OBD power vs battery pack
A hardwire kit uses constant and ignition-switched vehicle power and usually relies on a voltage cut-off strategy to protect the starter battery. A compatible OBD-II harness can simplify power connection. A dedicated dash camera battery charges while driving and then supplies the camera while parked, reducing reliance on the starter battery.
When an external battery makes sense
It is particularly useful when long parking surveillance is a priority, when the vehicle has a small or sensitive 12V battery, or when the vehicle uses smart charging. Vehicle-specific suitability should still be confirmed before installation.