[Closed] Show me your garmin external battery setups please

Hi all
Looking to see how people have mounted external power packs to their garmins. I’m looking to run my edge 810 for 24hours so was looking at one of these: http://www.amazon.co.uk/gp/huc/view.html?ie=UTF8&newItems=C3TJB1OULCSL00%2C1

Anyone else used it with good results?

I have a power monkey already but it has problems with resetting the device and making it go haywire. I think this might be the cable adapter that came with it.

Can someone point me in the direction of what sort of cable I would need to make sure it just goes in to charge mode and not pc mode? I have a cable that doesn’t link the garmin to pc but just charges it, assume this would do the trick?