Well every electric device drains the battery.. that's just what they are! The question is how long you will leave the car before the next car restart and how much the the extra the blackvue addition drains.
The general comment I have with these devices; no matter if they are for cameras or car-onboard computers eg ITX boards is they only take the cheap / mass production way out.. ie they test voltages only and don't measure amps.
These things usually works like this... they require you to wire a power supply and an ignition switched power source.. so that it can sense when the ignition is On/Off... When the ignition is off and voltage is under or about 11.2-5V.. it starts the timer to shutdown the power socket.
Another thing is it depends on your car.. If your car is a later model say 05+ where bluetooth, usb sockets etc are standard already... there is a good chance one of the power plugs already in the car will do a similar thing eg the USB jack or build in cellphone cradles. I know my newer cars' iphone cradles do voltage sensing to prevent power drain. So check your own car first, before you decide. You might be able to tap an existing powerline to the Blackvue for the same functionality.
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Originally Posted by optiblue
That thing seems risky. It just drains your battery until it reaches what it thinks is a "safe" level or a certain number of hours. During colder days, it could make the difference between starting or not. I can't believe those $50 dash cams come with a built in battery while this one just has enough juice to power itself down LOL
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