I wasn't entirely happy with my Son DynoHub, but the forumites put my mind at rest. I had in the meantime decided on a new wheel and had SJS lace up a Hope hub to an Andra Rigida rim for me. This left me concerned about how I would charge my electrical gear on a forthcoming UK tour over 6 weeks (4 weeks riding). I would be camping wherever possible.
I came across PowerTraveller
https://www.powertraveller.com/ (originally spotted in a post by Il Padrone here
http://www.thorncycles.co.uk/forums/index.php?topic=8729.0) and was really taken by their video on the PowerMonkey Expedition, which is accessable from this page
https://www.powertraveller.com/en/shop/portable-chargers/outdoor-adventure/powermonkey-expedition/. The trouble was that the wind generator and tripod stand would not be available until end of Q2. As PT have already missed one release date I decided that I wouldn't wait, which was a relief for my wallet, as the original kit is £450. I looked around their site and my eye was caught by the PowerGorilla
https://www.powertraveller.com/en/shop/portable-chargers/professional/powergorilla/ At £160 it was certainly a lot less money. I found it on Amazon a little cheaper, say £15, but when I came back to the Powertraveller site I noticed that they were throwing in a free Spidermonkey hub (worth £40), through which I would be able to charge up to 4 items simultaneously. Now this really did have great potential, as there is nothing worse than having to wait for one item to finish charging to be able to start on another; other than world hunger of course, I decided that I should buy the pair.
The PowerGorilla is 21,000mAh HD lithium polymer battery in a box capable of charging 5-24VDC, and comes with more tips that I am ever likely to find a use for, so there isn't much that you can't plug into it with either the cables and tips supplied or the cable that came with your gadget. Sorry to labour the point, but the SpiderMonkey really does extend the PowerGorilla's usefulness, and I am really glad that I didn't go for the Amazon discount, instead buying direct from PT. I will now be able to charge the iPad, GPS, Kindle (maybe?) and phone simultaneously. My only criticism is the length of the mains charger for the PowerGorilla. It's just too long. There needs to be less of it as it will always be carried around. I will look for another figure 8 (sorry, don't know the technical term) cable, hack it down to 6 inches and put a 3-pin plug on the end. Then I can just grumble about the length of the other cable that comes out of the transformer, which I don't intend hacking back.
You can plug a Solar Gorilla into the PowerGorilla to charge it up, but this far north (60 degrees north) we don't get enough light, but if I am lucky to become more like Matt, and be allowed out for longer touring trips further afield, especially into France, Spain, Italy etc. I could see one of these in my future!
I have since bought another extending lead and a bag for the leads and tips. PT's service is very good, certainly better than their predictions of when an item will come out of beta. The PowerGorilla and SpiderMonkey were shipped by UPS, only being delayed once they were handed over to Shetland Hauliers for the trip from Dundee to Aberdeen and across the sea to Shetland. The extra cable and bag came via the Post Office, breaking all records by being sent from Havant to Shetland in about 20 hours, nothing short of a miracle.
Disclaimer - I bought this myself out of my own hard-earned cash. PowerTraveller haven't offered me anything to write this.