The straps that fasten the bag to the bike seat can detach and get entangled in the rear wheel of the bike, posing crash and injury hazards to the rider.
The metal around the cord can become electrically charged if it contacts the USB wall charger plug prongs while charging, posing shock and fire hazards.
An incorrectly wired chassis harness can cause an incorrect throttle control signal to the electric drive motor, which can cause the vehicle to accelerate unexpectedly, posing a crash hazard.