@pellusfromtellus - well yes and no. I live in Sweden, we had aprox 1600 stove fires (dry cocking and electrical failures) last year and 15 fires from usb chargers... (no ref, heard on tv). So you need to be carefull but also know that its not impossible and you will not start a fire if you have a basic knowledge. Its finding a good balance...

:) Lovely. Will be this evenings experiment – if I got the right PIRs.. ;) – to find out... Thanks for answering! /Pelle

Yep, that was it.