Hi... I have been reading a couple of threads here and from what I could tell needed a battery with a 12v output so I went out and got one of these Anker 2nd Gen Astro Pro2 20000mAh Quad-Port External BatteryAnker | Support and a cable from MikeGuyver. When I plug everything in seems to work briefly (says it is on AC power) then switches to battery. Figured I would check here before I started calling support. Should this setup work?