Quick question: I recently received an Aukey 20kmah battery bank and planned to use it with my Make Noise 104hp skiff. The MN accepts a 15v input for its power supply. I purchased a USB 5v–>9/12/15v adapter and verified with a meter that it supplies 15v. However, when hooked up to the skiff, nothing happens (well, the MN logo glows dimly but that’s it). ModularGrid has my power consumption estimated at 970mA on +12v and 450mA on -12v. Am I missing a component?