All dedicated dash cams have one, but action cameras generally don't.This may use the g-sensor, but is specifically for recording impacts (or movement) when your car is parked.Plus, many cars cut power to the accessory socket when you turn off the ignition, so you may need to get the camera hard-wired by a professional to use this feature.Hardwire kits can be installed to give the camera power all the time, or in cars whose 12V socket remains on when you turn off the ignition.Just watch some of the UK dash cam compilation clips on You Tube to get an idea of how picture quality varies.
The G-sensor detects impacts and - usually - locks the recorded video to prevent it being deleted.
You can get a decent dash cam with GPS for around £70-100, but you'll pay more if you want extra features, and even more if you want a rear camera as well as front.
Some insurance companies offer discounts if you have a dash cam. offers 20 percent, and for young drivers, My First Insurance has a specific dash cam policy in association with Nextbase which gives you a 30 percent discount.
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