I've got a 2ch Blackvue that's hooked up via the cig lighter so it's off when I'm parked. Is there a powerbank I can use to power the cam on the infrequent trips to the mall/movie theater? I'm guessing I'd have to buy a 5v cig adapater to USB? I haven't been able to find one. Anyone have any suggestions on how to accomplish this? I don't mind charging at home and bringing the power bank to the car every time I need it.