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Guide
Most dash cams record in a loop while powered during a journey. Parked recording is separate and usually needs a supported parking mode and power connection.
Usually, it records whenever it receives power and has a usable memory card. It writes short files in a loop, replacing the oldest ordinary footage when storage fills. A fault, paused recording or lost power can interrupt that cycle.
Loop recording is temporary by design. An impact sensor, manual button or connected feature may protect a clip, but you should copy important footage promptly because capacity and protection rules vary.
A socket-powered camera commonly stops after the vehicle cuts accessory power. Parking recording needs a compatible hardwire kit, dedicated battery or a vehicle socket that remains live, plus battery-discharge protection.
It can remain available for parking surveillance if the maker supports that use and the installation manages power safely. Heat limits, card endurance and vehicle-battery condition still apply.
Tesla says Dashcam records the vehicle surroundings while driving when enabled, but saving depends on the chosen setting and available USB storage. Recent footage is overwritten unless saved; Sentry Mode handles parked monitoring separately and has regional and configuration limits.
Check the status indicator specified in the manual, review a sample file and verify the date. Reformat or replace the card only as instructed, and inspect the system periodically rather than assuming an old installation is still working.
Common questions
When enabled it can record during driving, but unsaved recent footage is overwritten. Sentry Mode is the separate parked-security function and does not guarantee that every event will be saved.
Only with a supported parking set-up and power protection. Continuous availability still depends on battery state, temperature, settings and storage.
Not from an accessory socket that loses power. Parking mode requires an appropriate permanent supply, hardwire kit or dedicated battery, depending on the model.
Until it is overwritten, deleted or protected, depending on file type and settings. Capacity, bit rate and the number of cameras determine how quickly ordinary clips cycle.
Keep exploring
The Nextbase 622GW is our balanced UK pick for its detailed recording, stabilisation and accessible touchscreen. Garmin Mini 3 suits a discreet fit, while VIOFO A329S covers the front and rear at high resolution.
A dual-camera kit is the direct choice when you want the road ahead and traffic behind in the same recording system. Check rear resolution and cable length, not just the headline front-camera specification.
Start with the coverage you need: a discreet front camera for the road ahead, or a front-and-rear system for evidence from both directions. Our guides then narrow the choice by installation, connectivity and brand.
The 622GW has the strongest recording specification in this trio; the 522GW keeps the large touchscreen and polarising filter at 2K, while the 322GW covers the essentials.