Battery power supply for Intel Compute Stick
It looks like the Intel computer is really sensitive to overvoltage. You could use a two stage power supply for it - a buck converter to drop the voltage down to, for example, 7 volts and then a linear regulator to provide clean and spike-free 5V. The intermediate voltage (7V in my example) should be just slightly higher than the minimal requirement for the linear regulator for best efficiency (though efficiency won't be that great anyway).

I used LM338K to make a car power supply for my Viliv N5 palmtop which has the same problem.