BESTEK 150W 12V 220V converter crete up to 360watts power the laptop, iPhone, iPad, PSP, DVD, GPS MRI1513U-EU (Electronics)
I did the following tests: I used the USB 5V with a gps: no problem 80w 230V UPS with a blender, it cuts out (except low speed). I tested it with a laptop PSU empty: OK but I have not tried with a discharged computer with a big enough radio: OK Other
