Sena should develop a contoured sticky mount (similiar to what they offer with their cameras) that has a flat outside surface. They could be or 1) different sizes or 2) one that can be cut down to mount the small powerbanks that are available on Amazon to mount it on the side or rear of a helmet. If it was just a flat surface velcro would be attached to mount a battery or have a mating type like you use with the cameras to attach the battery. An auxiliary power source solution is a must have with a 4k camera as they use so much power. I have seen nothing like this offered by a third party yet thx