Echo dot && plus battery +backup

Sometimes one just want to travel with some gadgets to make their life easier... $;-)

I came with this battery backup to unplug my echo on the go - it serves echo plus, echo dot && other 5V@2A usb hunger devices.

For sure I could plug some 12V≈15V (15W) power source to this and turn it into a uninterrupted power source for any USB gadget (iPhones, iPads, androids, etc...) - but the goal here is to let echo travel without wires around home/outdoor spots.

I 3D printed the .stl file on my E3D BigBox using proto-pasta HTPLA carbon fiber original, but some could do it ABS too. My printing settings (Simplify 3D):
√ 15% infill;
√ 0,2mm high; 2x2x2 top/botton/outline layers;
√ fast honeycomb/concentric 15/35/100% interior fill/outline overlap/infill extrusion width;
√ no support;
√ 217º/60ºC extruder/bed;
√ 2200mm/min 65/100% outline under/solid infill speed (I like it slow ≈ 5hours top);

Some info available on the .pdf + BOM:
√ goo.gl/vquLDm
√ goo.gl/M6EE8P
√ goo.gl/ByJYV