Regarding the lithium batteries, for the record they seemed to make matters worse, not better. I'll need to move the display unit to the same side of the house as the station - obvious I know, but easier said than done as I need the PC connected to it too to grab the data and serve up the web site. I'm using this as an excuse (if ever I needed one) to buy a new laptop :lol: so my little mini-itx PC can then be run headless in the spare room and dedicated entirely to the weather stuff.