Car Cam turns off too soon

I put the new car cam in a Lexus CT200h Hybrid. One of the features that I thought would be great to have is to monitor the car when I am parked and not driving the car. In fact, you have a video selling the feature of recording your car being hit while parked. Low and behold, the disappointment is that the car cam turns off ecause of low battery usually about an hour after I parked the car. This is even when I drive for 26 miles/1/2 hour. The car is a hybrid so I know that it has a lot of battery. This is a bummer since that is one of the selling features of the car... very disappointed with this 'nonfeature'.