The Blackvue B-112 Power Magic Battery Pack can power your dash-cam for up to 12 hours. Using super fast charging Li-ION battery technology, this is the product to use for solving all of your dash-cam power issues.
Dash-cam batteries are the solution to dead vehicle batteries for those dash-cam users who wish to keep their dash-cams powered even when the vehicle is off. Using a dash-cam battery keeps the power source for the dash-cam completely independent from the vehicle's starting battery, meaning you never have to worry about a dead vehicle battery ever again (at least one caused by your dash-cam that is).
We recommend this product for all 2013 - Up BMW vehicles that are equipped with a battery management/warning system. This will eliminate all battery warnings from popping up on the driver information screen.