Right, I have been looking up the options and have come across a Battery Sling like you said, but how do they work,
assuming the rifle is front wired, are there wires throughout the sling so that you connect the sling and then connect the wires to the front wires of the rifle, which then trail through the sling to the battery back where obviously you connect the battery, and battery pack rests against your back?
Sorry if that is a bit gibberish but I am not entirely sure how they work