Temporary power from my 18V Dewalt battery packs

I mentioned in another post that I would be making a 3D printed adapter for my Dewalt 18V XRP Li-ion batteries to provide some *short term* relief during power outages. There are plenty of acceptable ways to solve this problem, but since I have lots of these Dewalt 18V XRP batteries and a 3D printer, I thought I would create my own solution for very little cost. It has two 5V USB ports and two 2.1 mm 12V ports (tip positive). I'm using two LM2596s DC-DC step down converters to change the voltage. One for the 5V USB ports and one for the 12V 2.1mm ports. I used the connectors from inside a standard household wall receptacle to provide contact points for the battery. These batteries are 2000mAh @ 18V, so it will not provide enough juice for your entire cook. I'll probably make a Y connector so that I can swap batteries without interrupting power to my HeaterMeter if needed.